Home Technical Discussions BMW E38 7 Series 1995-2001 (735i, 740i/iL, 750i/iL)

BMW E38 7 Series 1995-2001 (735i, 740i/iL, 750i/iL) electrical issues


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Last Post: Dec 26, 2010 1:46 AM Last Post By: wolverine
drog

Posts: 6
Registered: 03/22/10
electrical issues
Posted: Jul 1, 2010 1:47 AM
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recently after my first hour of driving my message center starts cycling, going through the diagnostics over and over. after this happens my turn signals stop working, and my headlights come on without being turned on and cant be turned off while car is on. the light on the instrument cluster also wont come on. when i turn off the car they go off but for the rest of the day every time i start the car the lights come on and signals don't work. the next morning the car is started and lights and signals work properly until the message center starts the diagnosis and lights come on, signals stop and cluster light wont come on. any suggestions
Charlie

Posts: 4,783
Registered: 12/09/03
Re: electrical issues
Posted: Jul 1, 2010 9:16 AM   in response to: drog in response to: drog
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How old is your battery?
wolverine

Posts: 6
Registered: 12/26/10
Re: electrical issues
Posted: Dec 26, 2010 1:46 AM   in response to: drog in response to: drog
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you somehow accidentally initiaited one of the 19 self tests that can be run from the two toggle knobs on the odometer easiest way to fix is to dis connect the battery terminals for an hour or so and then reconnect the battery, cpu needs time for all the capacitors to drain even after battery disconnect

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