The Trainer

The customer concern involves a battery that fails to start the car after it has been sitting - maybe a day or so - maybe a few weeks.
What is the best way to find the cause?
I may have an answer for you in today’s edition of The Trainer!
#parasiticbatterydraw #keyoffbatterydrain #batterygoesdead #testingbatterydrain #parasiticdrawtest
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Due to factors beyond the control of Motor Age, it cannot guarantee against unauthorized modifications of this information or improper use of this information. Motor Age magazine (Endeavor Business Media) assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. Motor Age recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of Motor Age, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage, or loss that may result from improper use of these tools, equipment, or the information contained in this video is the sole responsibility of the user and not Motor Age magazine or its corporate parent, Endeavor Business Media.

[@CaptainVillanueva1]

I would have loved to had a mentor like you when I took wrenching seriously. Learned the great bit on my own. Thank you for sharing your knowledge and taking time to make these videos

[@MotorAgeMagazine]

Your welcome!

[@NyNj911]

I would love to be in a shop with this guy...very brilliant man ⚒🛠📚📐📏💪🏾

[@scuba422123]

great vid pete! ive been watching....note some cars and modules may take up to 45 min to power down

[@MotorAgeMagazine]

On some European makes, longer than that!

[@charlesjohnson765]

Still didn’t talk about actually finding the draw which is the hardest part. Running through power and ground distribution, circuit configurations. Typically this part is the hardest part in actually finding everything that’s under that circuit.

[@MotorAgeMagazine]

Thanks for the comment. I'll address that in our December TechTip - out next Monday!

[@billsmith2212]

I agree that the scope.makes the most sense for many reasons . However , as a DIY with a DVOM , I am using the basics . I don't know how many diodes go bad in alternators , but a ripple voltage test is quick and would save time - if that is the problem . My ESI battery tester has it . The Topdon battery tester , UNDER $ 50.00 , has it . And you can use a DVOM set to AC voltage to test at the battery . It should be .5 or half a volt or less . I can't see a high end shop not having a tech trained on a scope . Most shops will be left in the dust .

[@davemc3650]

Thank you very much Pete Love you sharing all you knowledge. Wish u you and family happy holiday

[@arthurfricchione8119]

Pete great info as usual. Hard problems to isolate but if we follow a set course it might take awhile but it will be found. thanks for sharing Artie 😊

[@vin605]

Thanks Pete appreciate the info

[@nickayivor8432]

KNOWLEDGEABLE Sir Pete Meier Motor Age Tutorial great Thank you 👏 👌 👍 Sir Pete Meier Motor Age From Nick Ayivor from London England UK 🇬🇧

[@smms5056]

Excellent 👍👍 Thanks Pete

[@jamesbarratt593]

I noticed Not once did you mention about pulling fuses so I’m thinking along the lines that you don’t like that idea probably because if you pull of use when you put it back in maybe it might inspire one module to turn on don’t know. I await your reply

[@MotorAgeMagazine]

If you're chasing a module that won't turn off, opening the circuit may cause the module to reset and you won't be able to verify the problem.

[@jamesbarratt593]

@@MotorAgeMagazine hang on. Ok so fuse is the bridge for the electricity to get across the gap to whatever its there to power. But if you have the neg lead going through your multimeter to get to the neg battery pos and set to millivolts, if you see the draw suddenly drop, theres the drain. Was on a job today for a customer. Found his drain that way. Last of the fuses to pull in his engine bay. 70 amp marked speedo. Yesterdays customer though I never found and I had pulled all fuses and relays engine and inside car plus all engine connectors. Had same bad luck on 2010 Ford Kuga. Then read known issue was bluetooth module. So told customer to disconnect his phones from it and that was the drain. Pulling fuses has to be the best idea. Someone else said lead with low current test light from battery neg and then if touching fuses it lights theres your issue. Na I truly think pulling is good, but likely better if you dont put back straight away. Pull next fuse and next fuse. Till drain goes.

[@MotorAgeMagazine]

@@jamesbarratt593 Pulling fuses is a good technique and one we've used for a long time. My only point is that once you've pulled the culprit fuse, how do you locate the component if that component resets as a result? Another reality are modules that turn themselves on and off so monitoring current draw while testing ensures you're testing while the drain is occurring. Thanks for taking the time to comment!

[@jamesbarratt593]

@@MotorAgeMagazineUsually cars with drain are old cheap cars worth nothing. So to do the voltage drop way would be real fast and then my hourly charge would suffer tremendously. Pulling fuses I can make the job 3 times longer and so the money coming is better. 😀

[@hairycods2273]

@@jamesbarratt593 sounds like ur a parts changer most likely lying to ur self and ur customers so much that the empty skin covered gristle chunk attached to ur shoulders can’t even grow random patches of straight hair! I bet it grows really curly and only produces those thin curly hairs around the gob hole infested with large skin tags that serve as a ground for large African sh** fly’s to land there turd meat in the corners on the chunks gob and eat the sh** pieces as they mate on the skin tag dinner table around stinky gob while they listen to the chunks gob waste are good air with the lies you tell ppl!