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2001 BMW M3 Battery drain

Tiny
RJAMROZ
  • MEMBER
  • 2001 BMW M3
  • 6 CYL
  • 2WD
  • MANUAL
  • 51,000 MILES
Upgraded sat nav computer from mk3 to mk4 and also upgraded to a widescreen display. On the fuse panel it indicates under navigation that in position 7 needs a 5 amp fuse and position 41 a 30 amp fuse. Originally there was no 30 amp fuse when I had the mk3 computer so I put in the 30 amp. Since then the computer sometimes dosnt work (but this is rectified by merely pulling out the 30 amp fuse and putting it straight back in) and the battery keeps going flat. Any suggestions?
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Tuesday, July 21st, 2009 AT 5:05 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
You probably have a short circuit somewhere within the electrical system that's draining the battery-Try the battery drain test below.


https://www.2carpros.com/forum/automotive_pictures/12900_parastic_draw_1_113.jpg

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Tuesday, July 21st, 2009 AT 5:29 PM

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