battery drain information

[shogun]

Since practically every hollow space within an 8/7/5 is host to a control unit, many with memory and sensors, it is no wonder the E31/32/34 has such a high resting current drain. About 1 amp/hour drain about every 20 hours. Here's the figures:
With the trunk/luggage compartment lights off:
1.) Driver's door open: 4.8 - 5.0 Amps
2.) Driver's door closed: 4.1 Amps for 20 seconds then reduced to approx. 450-470mA for next 16 mins. then reduced to approx. 50mA
With the trunk/luggage compartment lights on:
1.) Driver's door open approx. 6.1-6.4 Amps
2.) Driver's door closed--approx. 5.9-6.1 Amps for 20 seconds, then reduced to approx. 2.5 Amps for the next 16 mins, then reduced to approx. 50mA


And remove the ignition key when engine is switched off



Found in other boards and combined for your info.

[632 Regal]

if you remove the key and just put it back in I think that problem goes away.

[shogun]

Does not help. CC module monitors 'key in ignition' and remains active till key is removed again.
Just try it. Install a multimeter between battery and the battery cable and then you can monitor it.

[632 Regal]

hmm... i have been leaving my key in after shutting it off, removing it and just slipping it back in. Never noticed the battery being low or anything when re-starting it even after a weekend.