How to Disconnect and Reconnect the Car Battery
Vložit
- čas přidán 27. 04. 2022
- Thank You for your Donation: www.paypal.com/donate/?hosted...
SUBSCRIBE So We Can Help You with Your Auto Repair Needs
czcams.com/users/FIXMYCAR?sub...
Also Go to Our Channel Community or Comment on any Video about What You Drive, Let us Know the Year, Make and Model of Your Vehicle
czcams.com/users/FIXMYCARcomm... - Auta a dopravní prostředky
Which number wrench
If you are referring from time line 1:00 the Negative post connector is the original size, and is a 10 millimeter. The Positive post connector in the video is not the original one, but it was replaced later with an original. If you have the original one then it is a10 millimeter
@@labourlawact7826 So you use a 13mm spanner. It's not rocket science.
The sizes varies by manufacturer and model of car. A few even use Allen head screws. You have to check for yourself.
The one that fits
Use the one that fits!
I have learn this like this: if I need to disconnect my battery, that means that I cannot ride, so that is a sad thing (a NEGATIVE thing); but when I connect the battery, that means I can ride again, so that's a cool thing (a POSITIVE thing). Call me childish but it works.
Best way to remember the sequence of the battery terminal removal and install is......
If you are removing a battery out of the car the car will weight less = Negative side comes off first.
If you are installing a battery into the car the car will weight more = Positive side goes on first.
love it
@@rc846😒too logical…😂
Funny, 50 years ago I was writing repair manuals for Chilton. First step for nearly everything was always, "Disconnect the negative battery cable." I wrote that so many times, it's seared into my brain!!
May I ask why negative first?
Certainly. By disconnecting the negative cable from the battery, you take all power away from the car. More importantly, if that negative cable touches any part of the car, it will not spark or potentially cause shorts or other electronic faults. If you disconnect the positive first and touch it to part of the car, you're shorting it, certainly causing dangerous sparks and potentially frying delicate electronic components these days.@@sjsupa
It's because the car is earthed/connected to the negative terminal. If you leave the negative attached you could accidentally touch the spanner used to remove the positive to the car body, it will stick itself to the body and go red and then white hot very rapidly ..... it's a sight to stop you ever making that mistake again.
First thing first, always roll down the driver side window, if you have power to the car or leave the door open. I have looked myself out and other friends have had similar experiences. Wanted to share.
Well spotted.
use a key
@@rc846 Some people dont have spares, alternatively it seems with older cars (80s to late 90s) you can unlock the car door as long as the bonnett is already open by messing with one of the sensors near the battery
As I like to say, "Start with black and end with black".
Thanks for the comment, See from 0:34
Thats smart you just taught me to remember lol
Crazy as it sounds, I've been working on cars (backyard mechanic) for over 20 years & I could never remember which is first.
Thanks for sharing your memory trick 😉
😆😆😆👏🏽👏🏽👏🏽👏🏽👏🏽
Beast
There have been a few suggestions on how to remember which cable to remove or connect first. Here is how I remember which cable to grab first.
When you add cables (hooking the battery back up) you are Adding so start with the (plus sign) Positive side cable.
When you want to remove a cable you are Subtracting so start with the (minus sign) Negative side cable.
Best of the best !!!
That's the only reason the terminals are called negative and positive, i.e. that's what those signs actually mean, add and remove. It has nothing to do with the nature of electricity, it is just telling you which to remove first and which to attach first.
The Battery is DC so YES, the Positive and Negative Poles do have significance.
@@apaulmcdonough2170 Yes and the significance is you ADD the battery to the system using the terminal marked with the ADD sign, +.
Thanks for Sharing
Perfectly done!! Using this sequence prevents a spark from jumping from the battery terminal to the battery cable clamp. Sparking the positive terminal can cause an electrical spike throughout the car's electrical system which can damage high tech gadgets as well as the alternator. Use the same sequence for connecting jumper cables. When connecting a battery charger, connect the clips in any order, then plug the charger into the wall outlet.
You're Welcome and Thanks for Sharing
I have been designing electronics including complex electronics for decades. As a general rule, in any electronic circuit, it is best to remove the positive power lead first.
If the entire circuit is completely dormant and powered down, it could be ok to disconnect the negative (ground) first, but the main reason why you disconnect the positive is because you may have forgotten some part of the circuit live or partly live. In this case, disconnecting the negative may have unexpected consequences - disconnecting the live will emulate flipping the "off" switch, which will ALWAYS disconnect the positive, or both, but never only the negative.
Someone below said that you remove the negative first to prevent shocking yourself. Wow. Once you have removed the positive lead, the only thing still "live" is the actual terminal on the battery. Not the lead. It is dead. And if you accidentally (really?) were to touch the positive battery terminal, this would expose you to all of 12V. I encourage you to try it. I have never, in 40 years of working with electrical circuits, received a shock from 12V DC.
We are considering making a video about the reason, if you would like to be notified make sure you click the bell for notification
Design many cars there bud?
I have received a hell of a hot burn. Had a radio in a box that I switched from one 18 wheeler to another. One night I knew connection was coming loose. Reached over the box to where connections were and my watch crossed the terminals. Never have I thrown a watch so fast or felt such heat. Remembered my USAF schooling: remove all jewelry when working on air craft, etc. Just checked, 25 plus year old scar is still there! Looks like captain bars!🦇
Disconnect the negative first so that, when disconnecting the positive, the wrench won't spark when it inevitably touches any metal.
@@dustbat I used booster cables to start my 97 Astro , not much room to get the clamp on the neg .terminal and then I touched the frame with the positive booster and then a big spark and now my nice radio is dead ! I left the radio on and it may not be worth repairing .
Thank-you for doing this very short and to the point video.
This is such a misunderstood subject, and it gets me fired up when I see people do it wrong.
I always tell people, disconnect negative first, and reconnect negative last.
I really like another guy's way to remember it:
If your taking away (the battery) remove the minus cable first.
If you're adding (the battery) connect the plus cable first👌
why in that order?
@@fase144 Two good reasons.
Disconnecting negative first presents no risk of shorting anything out with tools touching the frame/chassis/metal parts of the vehicle, since negative/frame/chassis etc all share a common electrical potential.
Once the negative is disconnected, if a tool touches the frame/chassis/metal parts while disconnecting the positive, there is no risk of a short or sparks etc since the circuit is already broken.
2nd, there is a risk of a relatively high voltage spike travelling through electronic components and damaging them if the positive is disconnected first or reconnected last.
By disconnecting negative first and reconnecting negative last, this avoids any high voltage spikes travelling through sensitive electronics👍
@@simonilett998 thanks!
@@fase144 The electronic voltage regulator/charge controller and diodes inside most alternators are particularly sensitive to voltage spikes and can be damaged quite easily, and given the alternator shares a constant connection directly to battery positive they can easily take a hit.
Also, quite a few of the electronic control modules/computers and even quite common for the fuse/relay boxes to be an electronic module nowadays, all have a constant voltage supply even with the key turned off, to keep their internal settings/storage memory alive etc, so these are all sensitive components to consider protecting from high voltage spikes👍
You're welcome and Thanks for Sharing
Perfectly done!! Very few people know what you just presented. See my comments below. The correct sequence as seen in this video also applies to connecting and disconnecting battery charger clips, although the safest way is to connect the charger's clips in any order, then plug the charger into the wall outlet. Either way avoids sparking the positive terminal of the battery.
Battery still Sparks even when hooking negative last tho
Thanks for Sharing
As a mechanic for the last 32 years, I'm kinda impressed. I only watched the video out of curiosity to see if you were correct. Nicely done sir! But WHY the negative first? Answer: the ENTIRE car in negative! Every piece of metal is negative! ALL OF IT! The only things that are positive are wire fed. So removing negative removes 90% of the electoral connections possible. and fyi, Volkswagen has the negative cables colored Red! Those dumb fu@ks... Oh, and way early like the early 50's or 60's, Ford made positive "ground” vechicals. It was a cluster fu@k so they stopped. Nice man.
So how do you say current flows in a DC system ? From __ to __
@@artyfuffkin7805 The answer is yes. To an engineer, it flows from negative to positive, for a physicist it flows from positive to negative. One counts the movement of the electron the other counts the movement of the atom that has a free space for an election.
@@scottmichael3745
As one Mitsubishi trainer said (to techs who finnally got neg to pos ) if you can make it flow pos to neg your a multi millionaire, for the IC possibility s
@@artyfuffkin7805 Lol! You though you were going to trip me up didn't you. Good try my friend but I also happen to have 7 years of college and 2 degrees. Don't assume a mechanic is a fool (I know You didn't). My buddy is a mechanic too and his BIL is an engineer (so is my dad) and the best shirt I ever saw said, "mechanics, because even engineers need hero's"!! Cheers 🍻
@@scottmichael3745
7 yrs of Community College likely, when you talk current flowing from pos to ground
Don't listen to him on auto electrics ,
You don't remove the negative cable first, you remove the ground cable first. It is almost always the negative cable, but on older cars from the 50s and back, positive was often the ground cable.
“Gound” means connected to the car body here
Playing with words does not make you intelligent. !
Seeing how close you came to shorting out the battery with the spanner reminded me of the time I did this, and the circuit was completed via my wedding-ring. The ring was instantly red-hot, and seared into my finger big-time. Had to cut the ring off, and took weeks to heal. Electrocution is almost impossible with a 12-volt battery, but that's not the only danger.
YUUUP,keep the wrench high,to avoid contacting opposite terminal.
At 1:00 in,he comes close to connecting both terminals.
Also, if you have to use a metal wrench, wrap the handle with electrical tape. It is quite easy for the wrench to simultaneously touch both the positive and negative of the battery creating a short circuit.
Thanks for Sharing
Or use a titanium wrench
@@SpringheelMac Interesting! I did a bit of "research" and it would seem that while Titanium has higher resistivity than many other metals, it can still conduct. What am I missing?
If you have any rings on wear gloves, if a spanner accidentally touches a live terminal or cable and a ring touches the ground the ring will melt instantly and fuse to your finger.
@@steverushforth7009 Yes, generally it is advisable to not have any exposed jewelry when working on cars....
There is a very good reason you disconnect the black eath lead first and then reconnect it last.
If you disconnect the red lead first and your spanner makes contact with any earthed part of the car then you then have a short circuit between the earthed body and the spanner on the positive, the result could actual cause the battery to explode or cause a very large spark and or the spanner getting that hot that it could actually melt the spanner.
Once the earth is off then it doesn't matter if the positive shorts to eath, the only thing you could do wrong is short the battery terminals out with the spanner which would be the same.
By putting the positive on first again shorting out the earth terminal with the spanner to an earth on the car body or engine block will be OK as there is no voltage difference between the earth terminal and the body, ie they are both grounded.
When disconnecting: it's black then red.
When connecting: it's red then black.
As someone else said - start with black, end with black.
Thanks for Sharing
My ex wife started with black, she now ended up with black again, so I guess it's a transferable rule 😂
Straight and to the point! Perfect video
You're Welcome, Glad you like the video
He didn't explain why this is important...
@@labourlawact7826exactly. Only half the information.
@@labourlawact7826 Because he gave all the information claimed in the head line.
He didn't mention why you should do it this way he just says this ( How to Disconnect and Reconnect the Car Battery )
One of the most honest videos made.
@@prussiaaero1802 Not really he gave all the information claimed in the head line.
He didn't mention why you should do it this way he just says this ( How to Disconnect and Reconnect the Car Battery )
One of the most honest videos made.
I was an auto electrician at the Ford assemblyy plant. In Australia cars with computers connect negative first then positive, to disconnect it's positive first then negative. This is to prevent an electrical spike damaging the computers. DC voltage runs from negative towards positive.
Thanks for Sharing
@@BLAlleylol like to see what the manufacturers say to you when you tell them how to do something
Bull$hit! That's just stupid!
@@BLAlley - Hmmm...seems James has nothing to say...LOL.
@@irishkelly654 or I’ve better things to do with my time
If you can't see which one is marked + and - just remember.. The positive (+) post is a larger diameter than the - ..
Good Reminder, but to be safe a voltmeter should be use to verify Polarity
Just one problem, you almost touched the other terminal when you were tightening the clamps. You should cover the other terminal to prevent hitting it with the spanner when tightening
Would it explode like a bomb? 😮
@@ytsux9259you can be splashed with Sulfuric Acid (H Cl) 😁🤨
Yes. I've done that before. Something to watch out for.
Thanks for Sharing
Almost doesn’t count
Perfect video. Everything you need to know, nothing you don’t.
Thanks
I kept an old computer UPS battery for use as an interim power source so memory settings don't get lost. It also comes in handy for benchwork. I keep the battery charged.
This dude had to reset his radio clock just for this video. That’s dedication!
Now you tell me, No wonder the clock is blinking LOL
Bro I stg I literally stopped the video I trusted bro soon as I hurd his accent 🤣💯💯💯new sub
Ground is First and Ground is Last. Easy way to remember.
Thanks for the comment
I was taught the phrase 'Pos On' 'Neg Off'.
When Installing a Battery connect Positive terminal First.
When Removing a Battery disconnect Negative terminal First.
Following this rule will eliminate the chance of Battery terminal shorting or sparking and damaging any electrical parts in the Vehicle.
🤔🤔
Thank's for Sharing
I learned this when I was working on aircraft in the Air Force. You always disconnect negative before positive and always connect negative last when you're putting it back in.
Thanks for the comment
Good job ! Clearly understanding, good all around !
You're Welcome, Glad that it is helpful
Simple but excellent video 👍
You're Welcome, Glad you like the video
The goal in disconnecting and connecting battery cables is to never allow a spark to jump from the battery's positive terminal to the cable. Here is the correct sequence; disconnect the ground cable first, then the positive cable. Connect the positive cable first, then the ground cable. This is the only correct sequence. If you allow a spark to jump between the battery's positive post and it's cable, it can send a spike current through the car's electrical system that can damage the alternator and other sensitive items.
What about a spark on the negative cable instead? Is that OK?
"Negative first. Negative last" is what I was taught on a mechanics course.
Thank's for Sharing
Thank you very good teaching. Straight and to the point. Do you have a video about cleaning the battery?
great video. thank you
You're Welcome
The one connected to chassis ground, usually the negative terminal, not sure of any newer cars but some old cars had positive chassis ground, on those you'd undo the positive.
Thanks for the Comment
your terminals are clean. shows that you know how to take care of your car.
Lol, my Toyota battery looks as this after 9 years, never cleaned or taken care of anything.
My gmc yukon battery cables never look gross.
In a basic tutorial like this, an explanation of what can happen if your Spanner touches both terminals at the same time would be good.
We are considering making a video about the reason, if you would like to be notified make sure you click the bell for notification
When disconnecting terminals,keep the wrench in vertical position,as much as possible.
Yes,it's a little slower,but much safer than moving wrench very horizontal,like at 1:00 ,and coming very close to connecting terminals.
As a PhD in physics, I can confirm there’s no difference whichever is disconnected first. In fact, in the labs, we’re always told to disconnect positive side first. As for cars as shown in this video, it’s more practical to disconnect the negative first, because it is connected to the car body as the ground wire. If you disconnect the positive side, it is possible that your mechanical tools can touch the positive and engine parts causing a short. If you always use caution and wrap the positive with insulation, then it actually doesn’t matter
The reason for disconnecting the earth lead first is because a short can be caused by mishandling the positive terminal.
Aside from the comments above, the other good reason is to avoid a fairly high inrush voltage spike traveling through the positive side of a variety of electronic components if the positive is re-connected last.
By reconnecting the positive side first, the last connection of the circuit being negative forces the voltage spike (small spark seen when reconnecting) to only be on the negative side of the circuit with virtually no risk of damage to electronics.
For example:
The alternator is essentially connected directly to the battery poz + neg, so there's a risk of damaging the regulator electronics or diodes.
Also, a lot of electronic modules have a constant power feed going to them, even with the keys turned off and removed from the ignition switch, so those modules can take a hit if reconnection is done the incorrect way around👍
Mmmmm , PhD in Physics , Huh . But clearly N E V E R worked on a Car . Even your own . Disconnect the EARTH side first , so any mis-handling on the " Hot Side " doesn't FRY the Computer Modules .
@@johncunningham4820 please read my comment in full, that’s exactly what I said!
Re: "As a PhD in physics".
There is no way you can prove that on here, many people claim to be many things on this forum.
The whole point to to protect you from shorts to the frame when you take off the positive lead. It is why you disconnect the ground first and put it back on last
Got it! Thanks for explaining.
@@carlkaufman2429 Always look and make sure it is the ground side of the battery, some of the older vehicles had positive grounds. Alsoo when jump starting a vehicle always go positive to positive and negative to negative on the battery.
Thanks for Sharing
I knew a guy who did the positive terminal first, wearing a wedding ring, and he grounded out through the wrench and the ring. Cooked his finger really good in a split second.
Then who did he sue? The car manufacturer? Walmart? The battery maker? Or china?
@@d0min0danc1ng He's not American. He didn't sue anybody. Much of the rest of the world takes personal responsibility for their actions
@@d0min0danc1ng I'll bet you're the least popular guy wherever you go. You sound like a guy that could bring up politics and other dumb shit in any conversation you have.
@@ardyjay I'm sure he cursed loudly!
Thanks for the quick answer and visual!
You're Welcome
Simple, straight forward, thank you!
You're Welcome
Great 👍👍👍
To the point and Simple.
Thanks
Much admiration for such technical skills.
Thanks
It's amazing how many mechanics do this wrong. Thanks!
You're Welcome
I’m just saying it takes a negative and puts a positive spin on it… G.Costanza
Thanks for Sharing
You determine polarity by tracing the cable's. Pos normally to the fuse or starter. Negative will go to engine or frame. White sharpy applied to the battery pos neg will help seeing them in low light.
Well doing that won't tell u what one to remove first
Do all the preliminaries still apply before reconnecting the battery?
Thank you so much, this is an extremely helpful video and to the point!
You're Welcome
Another helpful hint - you might want to leave the driver side window down - so you can access the car if it automatically locks
Thanks for the Comment
No one drives Rovers any more
Good presentation, but I dont think I would use a box wrench to loosen the clamp nuts. I think a ratchet wrench would be more safe. I noticed that the box wrench was getting a bit too close to either pole of the battery. The battery has HUGE electrical potential and if the wrench should become in series between the positive and negative poles it will immediately become very hot and dangerous as there is not fuse protection if you bridge the poles.
It has 12v. That's not HUGE potential.
@@trentbrownstone1481 . It also has up to 500 Amps , which IS .
@@trentbrownstone1481 The huge potential is the current flow from a dead short.
You're Welcome
The golden rule no matter what your doing is "Negative last"
True 99 plus percent of the time. However, if you have an older vehicle that is positive ground, i.e. the positive side of the battery connects to the body/frame you have to reverse the procedure. Also, you should ALWAYS connect the cables oriented in a direction that prevents your wrench from turning into the other battery post when loosing the cable.
Also note that the positive terminal, if round as shown in the video, is larger in diameter than the negative terminal to make it impossible to connect the cables to the wrong terminals. However, there are other types of battery terminal.
Also the cables are made short so you cannot cross them, that's on latest car models, older cars have longer battery cables, he did a thorough job, thumbs up.
Thanks for Sharing
eddieBoxer Thanks
And be careful when you unscrew and rescrew the battery because your wrench can touch the other lead. Happened to me once.
Shocking
Well , that would be a YOU / Clumsy Problem , wouldn't it?...................................
The negative cable is always a single cable. The positive invariably has multiple wires connected to it.
Excellent... Many people need to see this video... I did...
It would be good to mention connecting a 'memory keeper' to the port inside of the car.
If connecting a memory keeper to the obd2 port, or cigarette lighter socket, be sure to wrap/insulate the positive battery cable terminal while it is disconnected to avoid a potential short to ground👍
Thanks for Sharing
Would have been better to tell the important WHY you do that this way. Because everything around the battery, especially the body and the engine ARE MINUS and fumling with a metal wrench at the positive terminal may easy produce an immense shortcut which may even lead to fire. This cannot happen if you first remove the minus connection. After that all parts like body and engine have no potential for shortcut anymore and you can work on the plus connector.
Vice versa.
Sometimes things can be remembered better if you know the reason for doing something.
Thanks for Sharing
What about having to reset the electronics in modern cars. This is a must, so need to confirm what is needed to be reset from your car owners manual. Good luck.
It would have been good to note for people
The { NEG } post is smaller then the { POS} post as the terminal size is as so as well.
I go with
{ NEG FIRST OFF /. LAST ON.}
{AS then you have NO Circuit }
With your hand or glove over the other terminal you can not short the wrench between battery posts.
As I have seen three explode (( not my doing ) ) Don't want to see /hear of more/others.
As well Vaseline works well as a way of keeping oxygen out between the battery post and terminal. I like to see a slight bulge of vaseline when tight , so that it will weep down as that there slides off.
Could I just disconnect the negative wire if I wanted to have the car battery unplugged for the night, or do I have to unplug both sides and replug them for everything to work correctly and safely?
What is the Year, Make and Model of your vehicle?
This is a good question. Can't wait to read the answer (of course after knowing about the make and year of a car) and an explanation on how that aspect would make a difference.
You only need disconnect one battery cable.
It doesn't matter which you disconnect from an electrical point of view. No current can flow if either cable is disconnected.
You just disconnect the Earth (Negitive) cable and make sure it cannot touch the Positive
Just an honest question if your wrench touches both the terminals like if it slips off the bolt will that cause an electric shock? It looks like you got pretty close to connecting them with your wrench and It looked scary. I don’t know though.
Can you give the time line were your concern is at
@@FIXMYCAR he is saying @1:34, your hand was pretty close to -. He wants to know what if he accidentally goes so low that the wrench touches the -.
If the wrench's other end accidentally touches the - sign while touching the +, it will create a pop and sparks, but it won't kill you. You might get burnt if you still hold the wrench. The wrench might get get hot really quickly and turn red hot if it still touches both ends.
As long as you don't have any metal in your hand, even a ring, you won't get hurt if you touch both ends with your bare hands, but don't do this on a hybrid or EV car battery as the voltage is much higher.
The only reason it’s wise to take neg before pos is that if spanner slips and touches any steel part of the body nothing will happen But if you are not careful taking off the pos first and spanner slips to any part of the body you will have a huge spark which could ignite spilt fuel for eg and most likely fry your ecu
I watched a battery explode when a guy accidentally touched the wrench to both terminals at once. If there's enough residual hydrogen vented near the terminals, a bigger surprise than strong sparks is possible, and splashed sulfuric acid can make quite a mess!
Best way to remember the sequence of the battery terminal removal and install is......
If you are removing a battery out of the car the car will weight less = Negative side comes off first.
If you are installing a battery into the car the car will weight more = Positive side goes on first.
I have a positive earth car so always disconnect the positive first on that. The rule is disconnect the cable which is the earthed one (connected to the chassis) first.
Make sure you are not wearing any rings. I made contact with the positive side once by mistake. I never made that mistake again. Is an easy way to lose/cook…..a finger.
When I started my mechanics apprenticeship in 1970, one of the first things they made us do was to remove rings watches etc before touching a car
Negative first, negative last
That was shown in the video
Should have mentioned that if the positive cable is removed first, you could touch a ground with it. This would short because the negative cable is still connected to the battery AND ground.
How can you hit a ground if the active side is disconnected
And what if you have a leak to ground the only problem you have is the positive cable can spring back to the positive post because of the closeness and springiness of the cable
Mechanics in Australia still disconnect the positive side because of that
We are considering making a video about the reason, if you would like to be notified make sure you click the bell for notification
The positive cable surely is not long enough to reach the ground, unless it's a Ferrari or something low to the ground
ALWAYS remove the ground terminal first, even if it is a positive ground system. When the positive side is the ground, you must remove the positive ground first. It is all about the grounded side and NOT polarity.
Also, while you turn the wrench, may sure you don’t accidentally connect the +/- with it. Not a joke.
Thanks for Sharing
That's a joke right? 😂
Earth lead first; reconnect last. That goes back to the days when some cars (British ones especially) were positive ground.
There's really no such thing as "Earth" in automotive applications. The chassis of the vehicle is a conductor, not "Earth". It doesn't matter whether or not the chassis is positive or negative. The circuit is either open or closed.
@@davidbrayshaw3529 You clearly aren’t British.
Yep! My first car was a Triumph TR-3B, and it had a positive ground. You could still jump a conventional negative ground car but you had to be very careful how you connected the cables.
@@kfdaddy My first British car after moving to the States was a 1967 MGB-GT. My brain remembers the warning label - “IMPORTANT THIS VEHICLE IS WIRED POSITIVE EARTH” - being right on the face of the dashboard, but I could be remembering that wrong. Certainly it was in a prominent position in the car somewhere… you couldn’t miss it. I also remember there being an adapter box one could buy from Radio Shack so that you could fit a standard radio without converting the whole car to negative earth.
Thanks for the comment
Simple vid. Excellent instructions!
Thanks
Thanks Mr Fix! I Learnt Heaps 💡🧠! Selling My Serena And buying A Voxy!
You're Welcome
You did a good job, got it all right, but didn't explain...WHY?
You DO NOT take the positive cable (red) lose first because if the wrench on the positive cable touches a ground while the negative cable is still connected, arching happens. It can do damage. That is the same reason why, going back together, you connect the positive cable first.
There is a hook up and disconnect sequence for jumper cables also. I'll let you handle that.
You're Welcome. We are considering making a video about the reason, if you would like to be notified make sure you click the bell for notification
I concur that this is correct.
I'm tired of arguing with people that say "leave the neg side on the battery for safety reasons as it acts as a ground".. it's completely false. The cars tyres are rubber - there is no ground.
Also people that argue this are not aware that current flows Out the negative side toward the positive side. Yep, it's physics, the positive terminal attracts the current towards it. Definitely not the other way around. So you disconnect the end of the battery, the NEGATIVE end, so you're battery CANNOT give you a shock 😅
The positive end cannot do damage at this point unless you have a duel battery system
People are so uneducated and regurgitate dogma.
DEVARMONT7 said: "...current flows Out the negative side toward the positive side."
My response: Minor technicality but "current flows" is an incorrect phrase. A current, by definition, is "flow of (something)" In this case the something is "electric charge".
Also, both directions of the flow of electric charge can and do happen. It's in one direction when battery is discharging and the opposite when it's charging.
DEVARMONT7 said: "...the positive terminal attracts the current towards it. Definitely not the other way around. So you disconnect the end of the battery, the NEGATIVE end, so you're battery CANNOT give you a shock"
My response: No. Most vehicles are set up as negative "ground". With these vehicles it is wisest to disconnect the negative terminal first (and to connect it last) because if you didn't, you run the risk of shorting the battery causing, at least, sparks. If a vehicle had a positive "ground", it is wisest to disconnect the positive terminal first (and to connect it last).
Thanks for Sharing
Thanos for sharing bro
Balanced, as all things should be
You're Welcome, did you meant the first word or is a typo
But of course, if you have an old car do check which side is earthed. Some had positive earth with the positive side of the battery going to the bodywork.
Get your radio presets and your radio anti theft code first...or the radio won't work.
What will happen if the positive terminal disconnects while driving?
The car would die
See the video about Cables getting disconnected czcams.com/video/cVLE_J_38CQ/video.html
U'll stop & probably get rear ended as brake lights won't work
Great information video.Thank you.
You're Welcome
Very good information thank you sir🙏
You're Welcome
So if u wanted to jump start ur car, you still have to remove with tool?
Can you clarify on your question about the need to jump start or are you asking do you need to remove the battery to jump start the vehicle
@@FIXMYCAR I found out the answer, I was basically wondering where do you put clamps at on a car battery and I was using this video as a reference. My lincoln mkz 2010 won't start and I was scared to put the clamps on it. I thought I had to do the steps in this video in order to put clamps on
You can manuever them on the bolt attached to the terminals
@@krazziejrboi so I have a portable 12v car charger as this winter my battery 🔋 is dead...charger won't start at all....the positive terminal is loose like, I can wiggle it with my fingrr....I also see corrosion...I'm just gonna buy new battery...
@@ELEXANDERTHEGREAT if the battery test under 12.0 its dead and a corroded one yeah jist buy a new one lol
0 seconds ago
A Little meme to Help You Remember is:
- Naughty
+ People
+ Pick
- Noses
= 1st, Remove; - Negative, then + Positive
= 2nd Re-Fit; + Positive, then - Negative
= DONE !
I'm a Car Technician.
P. S:
PLEASE Keep Your Metal Tool's 🔧 Spanner's AWAY From the Other Battery Terminal 😤 💣 💩
I Nearly 💩 Myself 💩 💣 🔥
The easiest way to remember which cable you add or take off first is this...."the black {negative} cable should never be on the battery by itself." No problem!
Thanks for Sharing
Thank you!
You're Welcome
My wife asked me why don't they have a saying like righty tighty lefty loosy for batteries so I told her negative first or your finger will burst!!
LOL
Would replace finger with breast
A double insulated wrench is a good tool to use when working with start batteries.
Thanks for sharing
I crossed the positive removing the battery neg first. I had to knock the wrench off with a hammer. Make sure the positive is covered I learned the hard way
How long did it stay shorted
@@FIXMYCAR about 5 sec seemed like a hour
I'n planning to remove my seats tomorrow to clean underneath. Do I need to complexly remove the battery or just disconnect when im' doing this work.
What is your vehicle year, make and model?
Only if u cleaning underneath the battery
This is because DC current flows from the neg to the positive. Not the reverse like so many hobbiest techs think
No it isn't. It's because the negative symbol indicates which side of the battery to disconnect. And the plus sign indicates which side to connect.
@@aheroictaxidriver3180
You disconnect neg 1st otherwise you'd load up the capacitors and get a voltage spike , ever taken a auto elect course ? A good one ? Where does your charge wire go to ?
VAT 40 sounds like you never used one ....correctly
@@artyfuffkin7805 You disconnect neg first because that's the side that is indicated to be disconnected, genius. Negative = "DISCONNECT HERE." That's ALL the negative symbol means!!! It means to DISCONNECT on that side. It has NOTHING to do with how electricity works.
@@aheroictaxidriver3180
Take an auto electrical course
Taught by an electrical auto engineer but which way do you say DC current amps flows
.
Im a 31 yr auto 15 master ASE
@@artyfuffkin7805 The symbols on the battery have NOTHING to do with electricity, and nothing to do with ANYTHING that YOU have to say about electricity. The symbols mean CONNECT and DISCONNECT, and that's ALL they mean.
No reason is given why the negative first, it's because there is a risk of touching a metal part and turning the wrench red hot instantly at worst, or an arc flash at best. This assumes negative ground as most/all vehicles are today
Thanks for Sharing
You always do the Positive first. To unhook or hook up. The Car is a negative field. you want to break that buy removing the Positive so there is no chance or arking.. if you remove negative any metal it touches activates the circuit.
We are considering making a video about the reason, if you would like to be notified make sure you click the bell for notification
Technically (resp. due to historically definitions) electricity (power) flows from + to - . Which is physically wrong (but was never corrected in the definitions). That means: Electrons flow from - to +. Disconnecting the - cable at first interrupts the flow of electrons at the source.
Battery must be stolen having the 2 sides of the sticker blacked out.
Is a film effect. LOL
thank you scarface ❤️
Cool vid thanks for sharing!
You're Welcome
This was the most simplistic stupid video I have seen. It is also the most perfectly presented how to video I have seen. Great Job!!! Liked and subbed.
i like arc welding with battery cables...lol
?
Easy way to remember, the negative should never be connected alone to the battery.
Thanks for Sharing
If you know what you're doing and you're careful, you should put the negative on first. but most people hit metal when they do this, so put the positive on first. Ask any electrician - you always take the hot off first, and connect the hot last.
We are considering making a video about the reason, if you would like to be notified make sure you click the bell for notification
@@FIXMYCAR Most people should take the negative off first, so they don't accidentally hit metal if they're taking the positive off first. Electricians will tell you to always disconnect the hot first, connect the hot last. That's why switches, fuses, breakers, etc, are always on the hot wire instead of on the neutral.
Thanks so much, very helpful.
You're Welcome