1991 BMW 525 Electrical System Malfunction

1991 BMW 525
150,000 MILES • 6 CYL • 2WD • AUTOMATIC
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TAREQ HASSAN
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  • 1 POST
Recently, the cars electrical system shut down. The central locking system, the windows, seat adjustments, interior lights and the radio quit operating. The A/C, driving lights & ignition remained operative.

Removing the electrical modules in the engine compartment & re-seating them reset the system. Then the same issue recurred. Re-seating the modules did not resolve this the second time. Only when the modules under the rear seat were removed and re-installed did the systems start again.
Aug 18, 2008 at 10:21 PM
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DOCHAGERTY
  • CERTIFIED EXPERT
  • 9,603 POSTS
The general and lamp control modules are possibly faulty due to loose solder traces on the inputs to the edge connectors. Call (619)444-2290 and talk to Autobahn dismantlers. John or Sean will fix you up.
Aug 19, 2008 at 6:33 PM