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I own a 1993 940 with 149K miles. The battery slowly discharges and I have found the source to be something on fuse #5. Fuse #5 is the clock, audio (whatever that is), dome lights, vanity mirror light, glove box light, trunk light, power antenna, and door warning lights (the red light on the inside of the door).
Alternator ouput is fine and the battery is new. When I remove fuse #5 the battery remains charged. If I leave the fuse in, the battery is drained in 4 hours. The fuse does not break when left in the socket for any length of time.
Has anyone had a similiar problem and found the cause? Or have experience diagnosing the problem without taking apart the doors, dashboard, etc.
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