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pheno
01-20-2007, 02:06 PM
How much E34 should consume current with ignition, all interior lights off? Any reference value ? Either I have bad battery or some gadget is leaking..

markus
01-20-2007, 03:34 PM
12.3 volts or so

jrobbo
01-20-2007, 04:25 PM
The E34 should only draw a few mA with everything off, if you are reading anything more than about 10mA, then start removing fuses till you can find out what.

John

shogun
01-20-2007, 08:33 PM
30-40 mA
http://www.bimmernut.com/~billr/images/switch.jpg
http://www.bimmernut.com/%7Ebillr/images/closedcurrentlatercars.jpg

pheno
01-22-2007, 04:04 AM
Bought a new battery and no problems in 2 days. With this new battery I was getting around 500mA measured from battery's negative hub to negative wire. But then I did not know the 16 minutes 'consumer cut-off' from the second link Shogun posted.

Where's the voltage reading from OBC test 09 coming from ?

BillionPa
01-22-2007, 04:26 AM
exact measures via testing with an ammeter:

Car with all modules pulled: 20mA
Car with all modules put back in except GM: 20mA
After insertion of GM: 170mA
After letting the car sit for a while in that state: 60mA

it never dropped below 60. the draw values included removing the fuse from the radio, so 20mA just for the DME/TCU, meaning the GM draws 40mA by itself, and uses an additional 110 for LED lighting for that 10min or so period before they turn off.