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  1. #1

    Default CTSY Fuse Keeps Blowing

    I just bought this truck and know nothing about it.

    I have a courtesy fuse blowing problem.

    I can open the drivers door, replace the fuse and the interior lights come on, the power mirrors work and everything is fine. If I close the door the interior lights stay on. If I open the the door the fuse blows. I am thinking like you guys now. It has to be the door jamb switch. I took the door jamb switch apart. It had a spring inside, the push pin with 3 rail tabs and 3 rails that connect to connector. I cleaned all this stuff, put it back together and it is doing the same thing. The switch is such a simple assembly.

    I don't know if the previous owner took it apart and lost something that causes this problem.

    Is something missing out of the switch or has anybody experienced this problem and it was something else?

    Thanks!
    1999 GMC Sierra Classic C2500 Crew Cab Short Bed. 5.7L, Automatic. Bone Stock.

  2. #2

    Default

    pull the wires out from the door jam going into the door. more than likely got a chaffed wire causing a short
    GM TECH

    05 silverado shortbed

  3. #3

    Default

    yeah what Mike said, sounds like a chaffed wire somewhere.
    ROTARYENGINEPETE
    '07 GMC SIERRA SLT | Z71 | 4X4 | 5.3L FF

    LIFT:
    ROUGH COUNTRY 3" PREMIUM SUSPENSION LIFT + ADD-A-LEAF
    18" ATX THUG WHEELS
    33" NITTO TRAIL GRAPPLER TIRES
    EBC SPORT ROTORS
    EBC YELLOW STUFF BRAKE PADS
    LIGHTING:
    HELLA/VVME 4300K HID LOW BEAMS

    HELLA BLACK MAGIC OFFROAD LIGHTS
    ANZO USA PROJECTORS HEADLIGHTS
    ANZO USA LED TAIL LIGHTS
    ENGINE:
    K&N 63 SERIES INTAKE
    MAGNAFLOW CATBACK D.O.S.I.F.T. EXHAUST
    BULLYDOG TRIPLE DOG GT TUNER

    PULSTAR IGNITORS
    OPTIMA RED TOP
    DRIVETRAIN:
    YUKON 4.56 GEARS
    MAG-HYTEC DIFF COVER
    CORVETTE SERVO
    TRANSGO SHIFT KIT
    Z-PACK 3-4 CLUTCH
    REBUILT WARN XFER CASE
    BODY:
    RUNCOOL HOOD LOUVERS
    FULL WEATHERTECH VISORS/BUGSHIELDS
    DUPONT BEDLINER

    DEEZEE BLACK DIAMOND PLATE BED CAPS
    BULLDOG LOCKING SPORT FUEL DOOR
    DOOR MOLDINGS REMOVED
    CUSTOM WIRE MESH GRILL
    BUSHWACKER BOSS FENDER FLARES
    CB THRU GLASS RADIO ANTENNA

    5.5sec 0-60mph on pavement (5.2sec running E85), and a little less in 3 feet of muddy water

  4. #4

    Default

    I will check that.
    Thanks!

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