Question about 1988 Audi 90

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1988 Audi 90 Fuse #12 back up lights & dash lights not working

I just bought this car and I am having trouble figuring out how to fix this problem. There is a million bulbs in the dash so I dont think that that could be the prob. Plus the back up lights are not working. I tried to take the fuse/relay block out to check for corrosion but could not figure out how to disconnect the wiring with such limited space. The ABS is also on that fuse and I think thatit works cause when I pull the fuse I hear a click from the ABScompartment.

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  • teakpalmer
    teakpalmer Jan 02, 2009

    Yep the whole harness from the car to the trunk is snapped in half I am going to attempt to repair it and I will let you know if it fixes the prob, which I have no doubt that it will.

  • teakpalmer
    teakpalmer Jan 02, 2009

    So it fixed the reverse lights, Thank You. Do you have any Idea on the dash lights?

  • teakpalmer
    teakpalmer Jan 02, 2009

    I took it off the other day and looked at it, I tried jumping the two screws together and still no results. Do you know of another way of testing it without an ohm meter?

  • teakpalmer
    teakpalmer Jan 02, 2009

    will do Thanks

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  • 702 Answers

Hi, first check the wiring at the left trunk hinge. The wires like to break from flexing from opening and closing the trunk lid. Also check the wiring under the shifter cover. It does the same thing. Your most likely going to find a broken wire from one of these places.

Posted on Jan 02, 2009

  • Lee Quiroz
    Lee Quiroz Jan 02, 2009

    Check your dimmer switch on the dash. There should be a knob that dims the dash lights up and down. The switch may be bad.

  • Lee Quiroz
    Lee Quiroz Jan 02, 2009

    Use a test light see if you have power to one side of the switch with the headlights on. If you do, check the other side and see if you have power there. If you don't have power replace the switch because you don't have power going through it.

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