Voltage Drop (A Visual Representation) High Resistance Testing
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- čas přidán 13. 05. 2020
- Voltage drop can occur in many automotive circuits, and for multiple reasons. Many people do not understand that faulty connections create heat, and with is high resistance. Although this is not my normal type of video, it may help some people by showing voltage drop while it happens. Checking Resistance or Ohming out a circuit will get you burned in the real world. Load testing is the way! As always thanks for joining us.
Please check out our Amazon affiliate link for some great items to help you become a better technician. www.amazon.com/shop/joesautoe... - Auta a dopravní prostředky
The 1 person that disliked this video must drank too much and clicked the wrong one.
him and his drinking buddy
I don't understand yet how many technicians, even the most experienced ones, hate thermal cameras by saying they are useless and expensive! Thank you master one more time!
Your videos have always been great, but lately they are getting to be exceptional. Very, very educational! Your rants even provide important information, LOL. Thank you for all of the extra work it takes to make the videos that help educate all of us. Semper Fi, USMC.
When you showed the battery terminal I wasn't surprised I've been telling people about that style terminal is only a temporary fix until you can get the proper cable and terminal for the application most people go to Wal-Mart get these cheap terminals and call it done.
Agreed. Those terminals should only be used for emergency repairs and then replaced with a proper terminal and insulation as soon as possible. They are guaranteed to corrode.
More often than not, a temporary repair becomes a forgotten/ permanent repair.
Some people think if the battery is dead it’s a bad battery. But that’s not the case anymore. It could be bad connections, charging problems, chafed wiring, parasitic draw, or the battery. There’s so much more to repairing a vehicle now. Great explanation and video.
Ok seeing that terminal instantly heat up like that was just too cool!
You are awesome!
I work in a factory and convinced the head of maintenance to buy one of these thermal cameras. Within a few hours of receiving the camera he found an electrical fault in the circuit cabinet of a large electrical oven.
Joe you are an ACE number 1 technician!!!!!!!
Once again thanks for the video. A picture says a thousands words. Skills and respect. You rock.
I appreciate that!
VERY GOOD ADVICE. Without a voltmeter or a thermal image, the tech is going to have a lot of frustration making things right.
Thermal imaging rocks thanks for the demo....
This is a really good video man. I have a thermal cam that sort of sucks. Even though it sucks, it has nailed some high amp circuits.
I use it for looking at brake rotor temps. Exhaust. Coolant hoses. It even measures customer anger level when I can't get to it right now.
Again Joe you teach us basic skills in diag ,well thought out and to the point great fresher for me! Thank you
I appreciate that!
Joe that is a great example of seeing a voltage drop( resistance) you got to trust your meter it’s so hard to fix something you can’t see but to be able to see it is a revelation ... Years ago I work with a mechanic( paul ) a great mechanic .. if a car came in for an oil change with repair terminals on the battery cables it left with two new battery cables ...if a car came in with the drivability issue and repair terminals on the battery cables first thing he did was load check and test the charging system and battery. And install new battery cables. Than look it to the problem,
Thanks for the video Joe. I have replaced so many of those temporary connectors in my life. My favorite is the hose clamp holding a stripped wire to the battery terminal. Ha Ha
I got an old crusty Jeep at home and electrical is my weak point. Dodges have trash electrical systems so i feel I'll be stumped more than once when she starts to fail. Thank you for the lesson and for makin the video I hope they payin off for you.
Joe what an outstanding video. I just took a class offered by Brian Mann on this very subject. The thermal imaging was really helpful. Like how it even showed how the wires heat up. Thanks for sharing. Hope you and wife are well Artie❤️
Glad you enjoyed it!
That was really cool. With so many of us being "visual" learners, this was a perfect lesson on one way to identify a voltage drop.
Nice thermo imager. Stay safe. 🇨🇦
Thank you Joe. Good job. Have a blessed and safe week to you and your family.
Thanks, you too!
Voltage drop is absolutely real. I had a Volvo or Volkswagen (don't remember which) that both the cust and our sales person swore it needed an alternator. Convinced them to let me fully test it. Turns out, I found a 1.7 volt drop between the alternator and underhood fuse block. Was NOT a cheap repair unfortunately for the customer because an entire cable assembly had to be replaced. But, it was a correct repair and I fixed the veh!
Thank you, stay safe my friend.
Great visual buddy, those clamps are diabolical.
Certainly are brother.
The force is strong in Joe 🖖💪
Ok first of all let me click like and thank you for shaing this clip. Now I will watch.
Thanks a lot!!
That's what I do.
The Flir thermal imaging tool is a bit pricey but does seem to work very well.
Good vid Joe! I used to see it a lot in 12V installs performed by amateurs or less skilled install shops on some rather expensive audio installs as well as building patrol car fleets from fresh delivered cars. The one install/repair shop in the city known as "Motorola" ALWAYS butchered EVERY install or repair they performed on patrol cars while the officer/deputy was waiting there and being paid to wait on it. Tax dollars pissed away because they had to leave there and come to the shop I worked at to get the job re-done and done right while paying again. Whether it was poor unreliable power/ground connections, shitty t-tap or scotch-lok connections where a soldered connection was necessary, (think 24/7 patrol car usage under vibration and strain), or a light bar repair that later required a power pack repair because they f'ed up the connections. Mind you this was before the days of this technology so old school electricity basics came in to play. Crank it up or sound quality cars with 10's of thousands of dollars invested going down in competition because some moron made a poor connection not thinking of the strain it would be under. Even better when they smoke a piece of equipment due to a bad ground and the customer pays for it. And do you think most tech schools, those that are left, are teaching the old school method let alone this? Hell no! Oh yeah one of my pet peeves of all...... trailer lights on personal trailers! Do any of the lights work on these abominations? Five or six scotch-loks on a single wire when the insulation is dried out. Glad you offer some insight for those that may happen across your channel to see how an old school thinking man makes it happen everyday. Thanks Joe!
And the trailer ground is through the hitch ball, right? Rusty hitch ball at that. LOL
my friend keep up the good work&dont mind the thumbs down they're idiots&sick off jealousy I feel sorry for their lost souls.👍
Tgat was awesome luke a small volcano erupting...thermal imageing is great
Good One Joe.
Super cool!
I always tell people Look at the print on the package that connector came in/on It say's "TEMPORARY",,,,,
i've used those clamps and have had no problem. its all in how you do it
Did u use your phone that did a vid on? Great reminders!! Thank u!!
Yes, the Catphones S61.
Those clamps do not hold up. That is a given. Your point about voltage drop can be on either side is why I built the tester that I shared with you. Good view on the thermal.
Hi Bruce: Did you forget to send me a copy of the tester schematic ?
Yes indeed. Thank you man.
@@rscelectrical7091 I asked for your email and never saw a reply
Very cool.
Permit me to offer a bit of what I hope comes across as constructive criticism: it appears that the green text did not fit within the margins, so I had to mentally piece together the parts that were not visible. I'm guessing something went wrong in the editing process.
Great video!!! I got a Flir TG 165, but keep forgetting its in my toolbox sometimes. Old ways of thinking, it just doesn't even enter my mind, know what i mean? 😂
Yes, many guys do the same with their scopes.
during Highschool working in Repair shop a 4 Cyl Toyota came in for slow crank after replacing piston rings and bearings, again slow crank, then a defective engine groundstrap was discovered, replaced it and voila it started just fine...
what an embarrassment Never fogotten this paux pas!
(did not have any practical electrical troubleshooting skils then let alone the use of a Volt meter)
Cool video. Sometime in the future I need to get a thermal imaging camera. That and an amp clamp. I was thinking of a Fluke brand amp clamp but not sure for the camera, can you recommend one? Back in the early to mid nineties, Ford Explorer negative battery terminals used to rot out on the inside, voltage drop testing was the only way to find the problem.
Personal preference on the thermal is Flir. Industry standard.
👍👍
I see you keeping that pimp hand strong
Super "cool" Video ,Thanks again Joe.Would a laser temp show any change? I mean it would heat up to some degree but you "get" my question I think?
Can I have my wife start the jeep and show a problem with a handheld laser temp tester ? Like checking my forehead to get into work.
Thanks man. Yes, that tool also will show the heat increase, but with the thermal you can actually see it happen.
Wow man I didn't know you could get Forward Looking Infra Red tools that can do that. I never really was that great with diagnosing things to begin with or was well equipped to do so. But I've found out the hard way that 3000 series tail light lamps with two different filaments can very easily put in to their respective sockets the wrong way like Christmas lights as opposed to headlights that only go one way and cannot be interchanged. Sometimes I would take a headlight that would not go on and put it in the socket on the other side to see whether or not it would go on indicating and electrical problem and not the lamp or assembly itself in order to help the mechanics at whatever company I worked for.
Thermal cameras are used much more frequently today as they are time savers, and are now more affordable than in the past. They can be used in many applications and people are starting to see the value. You have to use what you have to test. Voltage drop testing videos can teach you how to save a lot of time and eliminate guess work. Hope you enjoyed it.
Joe I have a 2006 ford focus (inherited from family) with a bad alternator. What after market do you recommend. Should I just get one from the stealership?
Denso reman if you can get it. RockAuto does stock them.
Ah the nice years of alt com and alt mon on those.... Not always the generator!!!
@Alan Gaudry, first I'd make sure it is the alternator that failed. If so, go with Motorcraft. Can be bought at stores other than dealerships.
Good advice here. Motorcraft is the OEM so of course that's first choice. First aftermarket choice for me is always Denso, if available. The other good advice is to check the rest of the system first or its all a waste of money.
get yourself a socket with the inveted torx type that will fit the studs if you have to change it. remove the nuts then the studs makes it so much easier to remove. it will come out of the bottom without removing the engine mounts but you may have to pry the engine about 1/8 -1/4 inch.
Hey man. This is the only way I can get ahold of you short of looking up your shop phone, which I m not going to do.
Will that security system programmer do a SKREEM in a Chrysler Crossfire? If you have ever dealt with one of these abortions, you probably feel my pain. Just to get to where I am I have used 3 different scanners and read everything Mitchell and the internet have to offer. I don't think either Chrysler or Mercedes know how this thing really works. Every scanner I have used gives me different codes and can or cannot communicate with different modules. I'm going to make the call and take the hit if I'm wrong. Programming is my biggest issue. The local Dodge dealer blew the lady off and Mercedes basically laughed me off the phone.
The im508 should do it
@@JoesAutoElectric Cool. Thanks man. I think I'll order one, just so sick of buying tools. Had my first 1234yf A/C in today. Lucky it was an electrical issue. I really don't want to buy a machine for it right now.
Thermal imaging is about the ONLY thing the Cat s61 is good for. Outdated software, shitty camera, TONS of problems with signal and battery and random failure. NOT AS ADVERTISED to be bulletproof at all. Made a mistake recommending it to a friend who bout it broke down within a month due to minor fall & CAT didnt honor the warranty blaming to be at fault. Bullshit build quality - horrible service. BUT the FLIR is good lol