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  1. #1

    Thumbs up Power locks and cigarette lighter fuse

    Hello. I am new to this forum so pls let me know if this is the right spot to post this question or if it would be better posted somewhere else. Thanks for your patience

    I have a 1999 K1500 suburban with a cigarette lighter/door-lock fuse that keeps blowing. When I replace the fuse, it blows instantly. We have used the cigarette lighter to power electronics while traveling and it seemed to work ok. What is the best methodology in isolating the short?


    Last edited by kguygm; 12-29-2009 at 01:40 PM.

  2. #2
    TRPLXL2's Avatar
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    Jan 2009
    Norwalk, Ohio
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    Welcome to the club!
    2004 Chevy Colorado
    LS1 5.7 swap/TBSS rear axle swap

  3. #3


    unplug anything that is plugged in to the lighter socket to make sure its not causing the problem then check for any foreign objects that may have fallen into the socket
    those two things seem to be the main causes of cig lighter fuses blowing

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  4. #4
    Jr. Apprentice
    Join Date
    Apr 2014
    Lake Gaston, North Carolina


    The cigarette lighter fuse in my 1998 Suburban does NOT control the power door locks. This is a very strange vehicle in that even a dealer cannot tell you where the fuse that controls the power door locks IS. I've actually been told by two dealer service managers these vehicles can have very different wiring harnesses. (????!!!!) How they do that when all the vehicles roll down the SAME assembly line I have no clue! If I were you, I'd look into just replacing the lighter unit (entire thing) and see if that helps.

  5. #5


    For that bodystyle truck, the power locks should be controlled by a 30 amp circuit breaker that's to the left of the main grid of fuses on the left side of the dash. It's a big silver box. I forget whether it's circuit breaker A or B, but it's one of them.

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