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  1. #1

    Default cig lighter fuse and door locks

    hey, im new here, just joined. I have a 1999 suburban 2500 and the door locks quit working, and found it to be the cig lighter fuse keeps blowing. Im not sure what to look for any one been through this?

  2. #2


    Welcome to the site!
    What do you mean by the cig lighter is blowin it??

    2002 Jeep Wrangler Sport 4x4 (the Yellow Jacket)
    4inch suspension 3inch body
    Straight 6 (383 Stroker within a year)
    36inch SuperSwamper TSL.
    Detroit Loccers
    Daily Driver Weekend Wheeler
    much more...

    2004 Sierra crew cab, 2wd, 5.3 V8
    2inch Daystar Leveling kit
    single dumped Flowmaster 40 sieries exaust(removed)
    Mb Blitz Chrome wheels
    Leer Bed Cover(for sale)
    50k miles

  3. #3


    my door locks quit working and i checked the wiring schematic and found that the cig lighter powers the locks, so i replaced the fuse that was blown and the locks worked. Now the cig lighter fuse keeps blowing when i replace it.

  4. #4


    sounds like you got yourself a short somewhere in the pretty sure you got 3 power sockets, doors locks and the cargo lock switch on that fuse. might be a couple others (refer to schematic). the only way to find the short is to test the components on the circuit. and if its still blowing the fuse then it probably a bare wire shorted on a a piece of metal somewhere.and the only way to find it is to test each wire in a process of elimination.hope this helps and good luck.

  5. #5
    Master Mechanic
    Join Date
    Oct 2008
    Brandon, FLA
    Blog Entries


    Definitely a shorted wire, if the fuse was changed and now it keeps blowing the fuse. Can be any one of the three on the circuit, elminate one at a time. Also checked to see if any one of the wires has rubbed against some metal and it cecame bare. Is it the factory radio or aftermarket? The lighter is in the rack below the area of the radio and some or one wire could have become bare.....


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