1995 735i Computer won't boot - Bimmerfest - BMW Forums

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Old 09-04-2012, 09:14 PM
jjgg jjgg is offline
Registered User
Location: Australian
Join Date: Sep 2012
Posts: 2
Mein Auto: 1989 735i
Post 1995 735i Computer won't boot

Hey Bimmerfest,

I really enjoy my car, but there are a few electrical issues which need to be fixed. The battery will run dead if I leave the car for more than a week, so after I drive it I need to physically detach the leads from the battery terminals. Also when I start the car, the onboard computer doesn't boot. I then can't read my odometer, fuel gauge or temperature gauge. However... when I rev the car with the headlights on, the computer decides to boot!? Anyone else have these issues? How would you go about troubleshooting/fixing them?

I've uploaded a video which explains the issues a little more clearly.


P.S. Brake Pads have been replaced by a registered BMW serviceman, and work fine, but as you saw, the computer likes to tell me they're stuffed. Anyone know how to fix that issue?
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1989 735i, battery drain, computer, obc

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