How to jump start a car - expert guidance from the RAC
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- čas přidán 23. 08. 2024
- One of our most experienced patrols talks you through the steps of jump starting a car.
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NEVER NEVER connect both cables to the one car first. There is always the risk of shorting the free cable ends. Once the flat-red is connected, then connect the end of that cable to the charged car. Then do the same with the flat-negative, and so on.
Come on RAC!
thank you i thought this video wasn't quite right and i couldn't quite put my finger on it thank you
This video is another reason not to join the RAC. It’s almost like they want you to call them out. Poor advice, is this an actor?
Cheers from Scotland.
I had a suspicion the RAC guy was wrong.
Should have mentioned removal of cables.
Someone else mentioned connecting one cable at a time both ends. I agree.
I have heard that the good battery car should not be running when trying to start the bad battery car. This is due to sensitive modern computer circuitry that can be damaged. Both cars alternators fighting each other when both cars are running and cables connected can lead to problems.
Also a good idea to run the good battery car for some minutes once connected, to put some charge in the bad battery.
This is how boring quarantine is...
Because of quarantine I haven't started my car and now got a flat battery
This video helped me a lot today. Because I try to jump start my sons car. And I was attaching the leads from my car battery positive to his cars battery to positive and negative to negative and the car will not start. Once I checked this video I found out that the negative has to attach to earth or just the metal of the engine the car started instantly. Thanx a million
I l6 the fact that you blew me 6 and I was k. 7kk m. I k
I 76 the m mn jm 6l8l
@@sizwebrianmajola6070 good a o
@@sizwebrianmajola6070 what the fuck are u smoking kid?
I would have 100% made this mistake as well
very concise, just jumped a car as guided. Thanks.
I put negative to positive and blew my ecu cheers
15 years!... U don't look old enough! 😅... Thank you for this 👍🏼
Thank you for the very informative video!
Need some help understanding....So I know the reason they say to put the negative lead on a ground, its because the battery may be leaking gas and a spark could flame up cause injury. What I dont get though is that it would seem that this does not apply if you start with the bad battery like in this video...because you will close the electrical connection at your good car.
Therefore the order does not matter as long as you start with the bad car connections first?
Can you explain the reason why on the flat battery, you Don’t connect the black lead to the negative pole on the battery but somewhere else??
Needs an earth
I was wondering this myself as I had to jump start my car the other day and I used the method I had in my head ( (+) of the bad to (+) of the good, (-) of the good to the (-) of the bad). But even my car manual says the last step, (-) of the bad, should go onto engine mount or similar. I found out it's because some batteries produces flammable fumes which could get ignited by the spark. Idea is to avoid this spark around battery.
I have two issues with this though:
1) I always see /small/ spark(s) when I connect or reattach the ground of a battery on my car. Either because I installed a new one or I had previously disconnected ground before I worked on a car. I can't avoid those sparks, what then?
2) The last step is dangerous as the ground is a hot wire, I can do a damage if I'm not careful while looking for a spot where to put it (if I can't use (-) of a bad battery). It's good idea to find that spot before using cables then.
Newer cars have dedicated places in engine bay where wires can be connected from/to (BMW that jump started me had those).
Mine would not start (-) to body. It would only start (-) to (-). Connecting to the body is only when no terminal is available?
pretty good, but most other vids guide to connect positive cable to both cars, not, as in this video connect positive end then negative end... wouldn't this leave two loose ends to possibly touch and short-circuit? also, they guide to use bare metal for negative/ground. bit confused now.
It's almost like they want you to damage your car further!
You are correct.
Very helpful thank you.
Not really, the explanation is wrong, you first need to connect the red cable to the donor car's battery +/positive terminal, then the opposite end of the same cable to the flat car's battery +/positive terminal, THEN you do the same with the black cable using the -/negative terminals, I hope you didn't follow this video, also read the other comments
Whats a body earth supposed to be
any unpainted metal under the hood, the engine block or part of the frame.
What about disconnecting? Which order to? Engines running or not?
disconnect the jump leads in the exact opposite way you put them on.
earth > neutral > positive > positive
I've had to wait 20 minutes charging the dead battery before it started - so don't give up straight away..
Have you ever heard of people "grounding the black cable"? Some places say to do that but it didn't work on neighbors car and had to do this way like you said. But why do lots of videos and websites say to do it?
He did ground the black on the dead batt car
Interesting - Very Helpful - Thank You
Attaching one of the the black negative grips to the car bonnet did not work for me. The car only started when the negative terminals were connected to each other. Some people here suggesting that the attachment point was not providing sufficient earth and a better location would make it start.
Once home, fully charge the battery via a mains charger. It will never fully recharge by driving the car.
Negative lead to a part of the car and not the negative terminal ?
Didn’t explain where to find a body earth
I attached it to the engine block. It worked.
@@WythenshawePhil what's an engine block? Like this is not a video for a real beginner like me
@@alaskafiedlermaybe don’t try it then? 😂
@@scottb4993 did I ask for your opinion??
Savage
Can you use speaker wire if you don't have jump leads?
no. Its too weak to handle the current. The current can go up to 100A or even higher for a short amount of time while starting. speaker wire will probably get very hot and smoke and might burn + For this to work, you need to remove isolation from the end, and then theres a big risk for a short. This is very very dangerous.
Even "thin" jump leads are the same size as thin WELDING leads, used on small, low power welding sets. Your better off just buying a good set of jump leads really, their not all that expensive at the end of the day and will do the job properly.
If you have a set of speakers leads big enough (thick enough) to use as jump leads, you've already spent more on them than purpose made jump leads anyway.
Thanks, love. I'll get permission from other car owner first!!
love you too
@@himegsweg love you more
Would be helpful to tell people why you need to earth it with some suggestions. I believe the earth is supposed to be connected last. Would be great if you did so and explained why.
Always connect positive first as if you do it the other way it can cause sparking when you conect the positive.
🤔 shouldnt the donor car's ignition be switched on ALSO connect the cables to the car with flat battery first so not as to drain the donor battery
Made something easy into something hard
I just use my hand crank
Good one Stan Laurel
what if one car is positive earth ?
Why don't you tell us everything about fixing cars, because the service you lot provide certainly doesn't cover it!
Elaborate?
You are like talking to someone who are already have some knowledge of what is going on. Do you know and understand those who seek help through this Channel mostly have zero knowledge about jump start a car. You should teach
in, from a very beginning A to Z. The way you teach is like take for granted
we are already know 90% of it.
Thank you very much.
Thank you
also good idea to connect a 12v power supply to the terminals so you dont have to reset items after such as radio pin, manyautosltd.com helped me a lot for fixing and replacing my car battery highly recommended
Skip to 1:15
The video's only 2 minutes long...
@@justCommando exactly what i was thinking! Lol
Where's the fun in that? I got greeted by an "OYYY!" and now i remember that some weirdos call their hood a "bonnet" 🤣😁👌
It would probably take 1:15 to to scroll down to this shit comment
Never lick the battery 👅
Don’t have sex with it either
Could I just caress it and talk dirty to it
This video gives BAD ADVICE - POTENTIALLY DANGEROUS !!!!
If, as is shown in this video, you start by connecting one end of each cable to the same battery, there is a risk that the metal parts at other ends of the cables may come into contact with each other, if they are not fully insulated externally. That 'short circuit' could cause arc-flash weldjng, damage the battery and even result in the plastic insulation of the cables melting and/or bursting into flames. Yoh should always first connect the positive terminals of the two batteries together using the positive (red) cable, and only then connect the negative battery-terminals together using the negative (black) cable.
Another point: Other videos advise NOT connecting the negative cable to the negative terminal of the flat battery. Instead, it should be connected to a bare metal part of the car away from the battery, which may produce hydrogen, which could cause an explosion. The other reason given is that connecting the cable to the negative terminal may affect the car's battery monitoring system.
@@johnlyon9330 Might want to watch the video again, it shows connecting the jump leads on the flat battery to the engine/body earth not the battery terminal itself.
It didn't work, i put the black lead on both the minus brackets and that DID work
That's probably because you didn't have a suitable grounding point. The whole reason that you are supposed to use a grounding point and not the negative terminal, is because when you remove the negative lead you can get a spark, and you don't want a spark to be anywhere near the battery!
The RAC has a zero rating in my opinion, they were late to my call out and are rude over the phone.
Not a very good tuition 😕
Just here for the usual keyboard mechanic know it all comments 😃
I'm not going to drive so what's the point
Why are you here then lmao
Talking nonsense about asking for permission to jumpstart from another car.. when you should be explaining where exactly you attach the negative leads to an earth.. most people don't know where to attach the negative lead now that they are being advised not to attach it to the battery.
Wrong! You should never start the dead car with the good car running. This can damage the electronics of the good car. Who trained this “expert”?
Really badly explanation for big company like RAC what a shame
This was a poor video
Just put it on a damn ground