Bmw 318i problems

SOURCE: 1991 toyota pickup fuel and temp gauges dont work

You might have a bad ground. According to my Haynes manual's wiring diagram, both gauges share the same ground and typically that is "located on the left side of the instrument panel", wherever that is. Sorry I can't be more specific about the location. While it may not be true on your vehicle (the wiring diagram states "typical late model" in its description), my wiring diagram says that the ground wire is Brown (BR). You might try locating that wire and track it to its attachment point. You also might try tapping into it and using a continuity tester and ground out the wire to metal (there's plenty of grounding points under there). Make sure the ignition key is off!! There might be a bad ground wire closer to the meters than the attachment point. Hope this is helpful. Allow plenty of time if you're going to investigate this yourself. Do you have other gauges? Do they work? I think that all of the gauges are ganged through the same fuse (but not through the same ground wire). You might consider checking the fuse to ensure that it's OK. Your owners manual that came with the truck will tell you which fuse is it. If there are other things on the same fuse and they work, it's not the fuse. I hope that this is helpful.