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I'm trying to diagnose a problem on my 1992 BMW 318ic;

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the Tachometer, interior lights, OBC...
I'm trying to diagnose a problem on my 1992 BMW 318ic; the Tachometer, interior lights, OBC, and stereo don't work. All other gauges/lights/switches appear to work fine. I already pulled everything apart, replaced the s.i. board batteries, checked much of the wiring, and tested all the fuses. I thought that the problem was a relay to the OBC, but since my car has no relay (since its just the 6 button obc), I'm at a loss. Please help me isolate the problem.
Submitted: 1 year ago.Category: BMW
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6/10/2016
BMW Mechanic: Steve, BMW Expert replied 1 year ago
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