How to Troubleshoot a dead battery and find a parasitic drain
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- เผยแพร่เมื่อ 25 ส.ค. 2024
- If your car's battery is dead after sitting for a few days, but the battery and alternator work fine, you probably have a parasitic drain. It's quite common to find these in glove box lights (like the one I found) or in any aftermarket audio equipment.
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Excellent video. That is an great presentation. Clear and concise. Great way to troubleshoot the battery drain.
Most of my parasitic drains have been blonde
best comment ;-)
the blonde 328? that's sexy af 👍
Bahahahaha 🤣
I've got more brunette variety parasites. Either can be a real bitch to eliminate.
@@KatrinaDancer just saw the way you walk on ceilings, nifty trick;)
Well done. This is the best video that I've seen on the issue. Much appreciated.
Thanks for this video. My glove box light was staying on because the glove box had previously been broken into, which had bent the glove box door slightly, which prevented it pressing the switch to turn the light off....
On a lot of BMW alternators if the diode is bad internally it will drain your battery. Even when the alternator is still charging . So check that too. Probably a video on that as well
You just saved my life and that of my car as well, i was planning to scrap it after draining my pocket!
I can't seem to thank you enough, though!
what was yours doing? mine started doing the same and now i cant even turn it on for 3 months. Im paying for it as it gathers dust.
Dealing with same issue on my 325i have already checked the easy bits...fusses and alternator, the drain is 80 mA.Do I have to check relays now? And maybe final stage resistor on a climate control..??
Many places can test your battery & alternator without u even having 2 take it out of the vehicle which is nice 😊
Super helpful!
You are Very good education 👍
I'm currently battling a bad IBS and battery on an 2017 F15 X5 with 60k mi. The car died, was towed to dealership they found little to none, died again, boosted several times, died again. After an CEL came I scanned it and it gave me a code for a bad IBS. The car battery won't charge on a DEFA charger (the bad IBS fully depleted the battery 4 times or more). Will be replacing the battery and IBS in one motion, the register it, reset the DME and clear the codes. If this doesn't cut it then I have no idea what to do next...
That's not a very difficult problem to find it all. I wouldn't be firing the "parts cannon" at it, that's going to get expensive very quickly. Find somebody with an amp meter that can determine how much Amps is being drawn, then put the vehicle to sleep and start measuring voltage drop across the top of the fuses until you find out which one is drawing excessive current, then get a wiring diagram see what's on that circuit and fix it.
do you still own your 328? Havent uploaded in a while is why I ask, btw I really enjoy your videos they have been incredibly entertaining and helpful!
Thanks a million for a very helpful video 🙂👩👩👦👍
7:12 You don't need to pull the fuses to check for a drain. Simply reconnect the battery then use the meter under the bonnet/hood. Connect the meter to ground (BMWs have a positive and negative terminal under the bonnet/hood too, eventhough the battery is in the boot/trunk) then the other side to the fuse (each fuse has a little hole in it to connect a tester without removing the fuse)
Nice trick, but do I test on amps or volts then?
ah never mind thanx tho for inspiring me, found an even better method: th-cam.com/video/lRcj1fQcWwU/w-d-xo.html
EXCEPT if you have a fuse with only one hole... please do share the magic
@@jurikristjouw MV
Don't you need to do something to put the car into "sleep mode" before testing it?
I was thinking that as well.
Well explained, thanks mate. So in your case you replaced the glove box light or what was it finally?
Yep. Well, there was nothing wrong with the light, There's just a little plastic bit that is supposed to turn it off when the glove box is shut. Just needed to be put back into place.
good to know! thanks
So what did your drain end up being?
2004 bmw 330 xi suddenly horn stopped working radio on off when visor lights pulled down air bag off.
BMW said it Clock spring and ignition switch
is that the likely problem One or both?. also a new airbag got installed about 1 year ago on the steering wheel .
Great video bro! Liked & subbed!!
Question: 328i battery drained down to 11vdc. I charged up to 12.5vdc. Left it over night not cold out in garage. This morning voltage is at 12.2 vdc. Is .3 vdc excessive drain for over night?
No, a battery will drop voltage after being charged, it's normal. In fact put the bolt meter on the battery as soon as you pull the charger and you can watch it drop, then level out.
Sounds like David Blaine
Do you still have the car ?
Funny cause You guys dont need to take any bulbs out…… simply just press in the door Locks the switches with turn the lights off without removing any bulbs asif the car is off, i Work out of my trunk all day long and do this to not drain the battery 👍
ac or dc?
Went thru this headache. My problem was the lcm
I feel your pain...i have replaced that part 3 times now LCM is a nightmare.
how do you know its the lcm?
@@Linoge279 after unplugging the lcm the voltage drain went away. So I just got a replacement and it fixed the problem.
I have a 2008 E90 328Xi (Nav/HID/Htd Seats/Park Assist/Fully Loaded) and it needs the bigger more expensive battery $500.00 and the 180amp Bosch Alternator, except if you disconnect the battery you need to have it "PROGRAMMED" by BMW to re-connect / re-install it. HOW do I perform a parasitic draw test @ 10A without disconnecting my negative terminal?
Brauch Faser You'd have to measure current draw from the fuses rather than the battery.
Mines was starter then I a dead cell changed I didn’t get it coded burnt my frm module replaced that now the damn car won’t start but I hear wrrrrrr 😅 and it’s killin me
i have a bmw like that you're testing and it is driving me nuts, each time i check for current leaks with my multimeter it only reads 0.02 amps always, so i plug in the battery terminal and keep going normally, checking battery tension every once in a while measuring always 12,60 to 12,80 volts (full charge) suddenly in an hour it drops to 3 or 4 volts, having this issue for months
Check alternator Voltage regulator and the wire going to it and make sure no rust built up and clean if possible
on my 2001 E46 I have to wait 16 minutes for the car to go to sleep. When I did this I did see a draw of about 700mA. I pulled out a fuse and the draw went right down. I put the fuse back in to double check and the draw didn't go back up... Which is weird.
Any idea if the CPU detects this and shuts that circuit down? seems odd really. My symptom is I fully charge up the battery, leave the car for three days and then drive it around for 2-3 days, the car will not start the following morning. Battery is dead. Not a clue...must be a short somewhere.
Pulling fuses to determine a parasitic drain is not the proper way to do it on a late model vehicle, all you're going to do is wake up the modules again and you'll end up chasing ghosts.
I tried do this. But when I connect 1 end of the voltmeter to the negative side of battery pole. And the other end to the ground side from the chasis. Everything get power like im connecting the ground side to the battery
yes, because you are completing the circuit with your meter. Just leave your meter connected and just wait for your car to go back to sleep.
I got my car diagnosed at o'rielys auto parts for all my error codes and most of them are electrical short circuits. do you think I'm better off buying the 100$ E46 repair manual to learn how to fix them? I have like 15 error codes and some are with the transmission. I have a 2000 323i sedan base model
I’m currently dealing with this 👎
This test will not work if there are intelligent electronics installed on the newer BMWs.
De
Thats not parasitic drain. You need to put your car in sleep mode. Do more research
Why are you talking so slow. Geez
bmw's have a draw of .4 to .7 for 16 minutes until it goes to sleep. then you can perform a drain test. this video is a waste of time