All Things Mk5 > How to Guides / Troubleshooting

Battery drain still happening... Completely stumped :( **UPDATE**

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Craigh1983:

--- Quote from: Teutonic_Tamer on April 09, 2014, 11:20:44 pm ---
--- 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?

--- End quote ---

I doubt I could leave it 24 hours as the battery will probably be dead by then but I could certainly leave it for 4. I am probably going to do that this evening.

Craigh1983:
Hey guys,

Thought I'd post tonights results...

Ok so I went out to the car thinking the fault may have gone away so I couldn't detect it but nope... its there alright!...And slightly worse than yesterday!

Fuse 3 - 91ma
Fuse 16 - 73ma
Fuse 17 - 33ma
Fuse 18 - 123ma
Fuse 19 - 792ma
Fuse 24 - 73ma

I did a battery voltage checks...
6.45pm = 12.2V
7.45pm = 12.0V
8.50pm = 11.8V

Absolute huge drain! So that's 3 nights in a row that the drain has been there. And btw I got these numbers using the conversion table that Ed sent to me.

Here is a photo of my fuses so that you can see which fuses im talking about.

Craigh1983:
I have a vague idea of what some of the fuses I have listed are for, however I was wondering does anybody know what FUSE 18 is for????????

And if someone could help me out in telling me what Fuse 3, 16, 17, 19 and 24 are that would be absolutely brilliant! :)

Cheers

Craigh  :happy2:

SI-R32:
19 is stereo, do you not have a user book with the car with a fuse list

doylebros:
Just confirm your year build - eng AXX or BWA  and gear box code or if it's manual or Auto. As there's a few different types!

F3:- I think is convenience system, but need above confirmed prove it!

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