Rear bumper lamps quit on me

Discussion in 'Sparky's corner' started by BrownNoise, Jul 29, 2018.

  1. BrownNoise

    BrownNoise Well-Known Member

    '70 GS hardtop. Packed up a bunch of tools & supplies to move the car to a new storage location, and on moving day the whole set of rear lamps (not including the side markers back there) had quit, at some point that week. Only had a few short chances to figure the problem out since then, but I've nearly disassembled the rear bumper harness to search for trouble. I'm almost ready to buy a new harness but unsure that will fix, please give me ideas if you can! I feel fairly inexperienced with DC wiring, maybe I need a quick clue...
    -no tail, no brake, no turn, but the side markers light up
    -fuses appear good, ground on RH lamp looks good too
    -can a bad lamp socket cause the whole set to look bad?
    -can it be a switch up front, separately running some tails without others?

    thanks, guys
  2. buick64203

    buick64203 Just plum crazy Staff Member

    There is a plug that the rear tail light harness goes into. Are you sure its plugged in? And if so, is there power to the end of the plug?
    matt68gs400 likes this.
  3. buick64203

    buick64203 Just plum crazy Staff Member

    And did you check the tail light fuse?
  4. matt68gs400

    matt68gs400 Well-Known Member

  5. BrownNoise

    BrownNoise Well-Known Member

    The fuses look nice, I replaced one, forgot which but maybe tail lamp fuse, no change. I’ve worked on a few spots that looked bad just replacing butt connectors or adding them, no change. My circuit tester may be worn badly, or I may be bad at using it haha…either way no lamps but the rear side markers so far
  6. buick64203

    buick64203 Just plum crazy Staff Member

    Unfortunately, there is no way to fix this without basic diagnostic skills (no offense). The first step is to check for power at the rear tail light harness plug. Depending on that answer, we can move forward
  7. telriv

    telriv Well-Known Member

    MAYBE something got unplugged when you were packing the trunk???

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