All Things Mk5 > How to Guides / Troubleshooting
Battery drain still happening... Completely stumped :( **UPDATE**
Craigh1983:
--- Quote from: doylebros on April 09, 2014, 09:47:35 pm ---Look at your scan at module 62 it tells you which door.
--- End quote ---
Ah yea sorry :)
Rear left door. It does say the fault is the window switch and come to think of it that switch is a bit stiff.
Looks like I'm going to have to consult the help of a forum member again if im to check the module and wiring etc as im not too sure if it something I could do myself?
Teutonic_Tamer:
--- Quote from: Craigh1983 on April 09, 2014, 08:57:49 pm ---Yep I'm pushing the bonnet lock down to make it think its shut and then locking the car. After the 2 hours I don't unlock it but just test the readings on the fuses. I did this around 4 times during that 2 hours. When Ed checked it about a month back they were all shutting off after about 20 minutes and you could actually hear the click when the computer switched off. So this time the car isn't waking up... its just not shutting down :/
The battery voltage went down from 11.9 to 11.7V in just and hour and a half.
--- End quote ---
0.2 volts in half an hour doesn't sound too bad. But your real hinderance is not the volts, it is the CCA - cold cranking amps. Batteries are also rated by something called 'Reserve Capacity' (RC), and that is basically a measure of its resistance to degradation due to long term drain (as in hours, not the 10 second short burst high current drain which the CCA is).
Does sound like you've got an utter ball ache! :sad1: Is it possible to leave it longer than 2 hours - say 4 hours, before checking for current drain, and maybe even 24 hours?
fransnz:
Might sound stupid, but have you checked all the earthing points to make sure they are secure and not corroding ?
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rich83:
.2v in half an hour so you battery will be dead in about a day at that rate.
Craigh1983:
--- Quote from: richwig83 on April 10, 2014, 12:17:23 am ---.2v in half an hour so you battery will be dead in about a day at that rate.
--- End quote ---
Yep. It was intermittent before and the car would be ok for a week. That's obviously not happening now and the fault has got worse so I am now disconnecting the negative terminal over night to save the battery.
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