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.
Which module is the culprit?
Comments:
Aug 21, 2008
- 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 along with the ones in the engine compartment and the rear seat modules re-installed did the systems start again.
The systems operated for a short period of time then went out again.
I had opened the modules, but none of the traces appeared burned and none of the components were charred.
One module (under the rear seat) had relays, but why would some malfunction and others not in the same module? Why would so many go at one time? Is it really the relay module, or is another module the culprit?Aug 24, 2008
- Recently, the '91 BMW 525i 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 along with the ones in the engine compartment and the rear seat modules re-installed did the systems start again.
The systems operated for a short period of time then went out again.
I had opened the modules, but none of the traces appeared burned and none of the components were charred.
One module (under the rear seat) had relays, but why would some malfunction and others not in the same module? Why would so many go at one time? Is it really the relay module, or is another module the culprit?Aug 24, 2008
- My '91 BMW 525i 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 along with the ones in the engine compartment and the rear seat modules re-installed did the systems start again.
The systems operated for a short period of time then went out again.
I had opened the modules, but none of the traces appeared burned and none of the components were charred.
One module (under the rear seat) had relays, but why would some malfunction and others not in the same module? Why would so many go at one time? Is it really the relay module, or is another module the culprit?
