Question about BMW 530

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I have a 1995 BMW 530i E34 auto (135,00 genuine k?s). It has an electrical problem which it would seem NOBODY can resolve, although I am not prepared to accept that. The brake warning light comes on, (only when the headlights are on) when I touch the brake pedal, and sometimes, if the indicator is operation at the same time, the warning system goes into melt down and says that the dip beam and every other light is faulty, when there is no problem with any of them. I have been to two mechanics, three auto elec?s, and completed the following: Replaced: ? LKM ? Brake light switch ? Computer module ? Every globe Installed extra earth wires Checked light sockets None of the above has worked

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The problem is a short in your wiring harness or a bad ECM (Computer). As you have already replaced the ECM I would start tracing wiring harness for a short. Because the problem is so large effecting all the lights as it does and the problem occurs when you press the brake pedal it seems to be a short. Check the Fuse block and any wires leading to the brake pedal switch for bear spots that might be grounding or rubbing against another wire and check any splices you, or anyone else, may have made. Your looking for signs of a short between the systems. If by chance you haven't replaced the ECM after checking your wires and fuse blocks, there is most likely 1 in the engine compartment area as well as inside the vehicle, the ECM is the only other common area these systems interact. I hope this helps.

Posted on Sep 15, 2010

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