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7 Series - E38 (1995 - 2001)

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Old 07-12-2009, 10:27 AM
strkie3 strkie3 is offline
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Location: tampa
Join Date: Jul 2009
Posts: 1
Mein Auto: 740i
Draining battery

I have a 740i that kills the battery in a day or 2 when it is not used, I need to know what the normal current draw is with the car turned off and what to look for causing the problem. Thanks
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Old 07-16-2009, 10:03 AM
mandrews1119 mandrews1119 is offline
E38 - Flight on 4 wheels!
Location: Atlanta, GA., USA.
Join Date: Jan 2008
Posts: 122
Mein Auto: 2001 750ilA

Have the battery fully charged and tested. Get several opinions if not conclusive, it could be a number of problems, but starting with the battery and then testing other components is a good way to start troubleshooting.
2001 BMW E38/750il V12
Anthracite Metallic: If this car were any faster, I would have arrived yesterday!!
BMW, the ONLY driving machine.! By the way, yes, it's fast...and NO! You can't drive it!! Power, elegance, styling, technology that is still cutting edge, the ultimate driving machine for sure.!
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Old 05-29-2010, 07:32 AM
Officially Welcomed to the 'Fest
Join Date: Mar 2010
Posts: 285
Mein Auto: BMW 635 CSi BMW 730i E38
Battery drain

Get a friend to remove fuses one at a time while you hold one of the battery leads disconnected but very close to the battery post as this will cause a spark to jump from the lead to the post or vica versa but be warned there are fuse boxes all over e38s and this will at least identify which fused circuit is draining current.
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