2002 STS Reverse Lights Not Working
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Cadillac Seville / Cadillac Eldorado Forum Discussion, 2002 STS Reverse Lights Not Working in Past Cadillac Vehicle Discussion; I replaced both bulbs and lights still aren't coming on. I put my finger on the relay and can feel ...
  1. #1
    ckeathley is offline Cadillac Owners Member
    Automobile(s): 2002 STS
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    2002 STS Reverse Lights Not Working

    I replaced both bulbs and lights still aren't coming on. I put my finger on the relay and can feel it pick up when shifted to Reverse. I am a little confused on which fuse is for the Reverse Lights. I checked the one that is labeled Neutral Safety Back Up, I'm not sure that is the right one. There isn't one labeled 'Reverse' . Any help is much appreciated.

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  3. #2
    Submariner409's Avatar
    Submariner409 is offline If it won't run, install a sound system
    Automobile(s): 2002.5 F55 STS/65500mi, 2004 Ford F150 SuperCab4x4
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    Re: 2002 STS Reverse Lights Not Working

    Do the rest of the bulbs in the trunk mounted lighting panel work ? Some of this series of cars has had problems with either the wiring harness - where it exits the left trunk hinge bracket - or the ground point at the left fenderwell body metal.

  4. #3
    JimD is offline Cadillac Owners Connoisseur
    Automobile(s): '98 STS (RIP @ 206,xxx miles)
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    Re: 2002 STS Reverse Lights Not Working

    Quote Originally Posted by ckeathley View Post
    I replaced both bulbs and lights still aren't coming on. I put my finger on the relay and can feel it pick up when shifted to Reverse. I am a little confused on which fuse is for the Reverse Lights. I checked the one that is labeled Neutral Safety Back Up, I'm not sure that is the right one. There isn't one labeled 'Reverse' .
    That is the correct fuse (10A, labeled NSBU).

    You could try borrowing a relay from another circuit as a double check.

  5. #4
    ckeathley is offline Cadillac Owners Member
    Automobile(s): 2002 STS
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    Thread Starter

    Re: 2002 STS Reverse Lights Not Working

    I swapped with another relay and still no luck. All the other lights on the trunk mounted panel are working. I checked for voltage at the harness on the trunk lid (between the black and green wires) and I'm not getting anything. I'm just not sure what to do next???

  6. #5
    JimD is offline Cadillac Owners Connoisseur
    Automobile(s): '98 STS (RIP @ 206,xxx miles)
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    Re: 2002 STS Reverse Lights Not Working

    If it was my car, I would start probing (with a sharp needle and a voltmeter) that light green wire in the trunk lid wire harness back to where it leaves the trunk lid through the LH hinge channel and is spliced into the body harness that leads to the underseat fuse/relay box.

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