89 Silverado K2500 4 wheel drive wiring diagram

Discussion in 'Chevy C/K Truck Forum' started by Hurdler5280, Aug 9, 2011.

  1. Hurdler5280

    Hurdler5280 New Member

    My Dad's truck stopped going into 4 wheel drive recently. Does anyone know where I can get a wiring diagram for the 4 wheel drive? He thinks that he isn't getting power to the actuator.
  2. csltrains96

    csltrains96 Rockstar 100 Posts

    If anyone out there has this diagram, I'm interested in getting it also. Almost anything would be better than the drastically incomplete diagrams that I've always found in the Haynes manuals.

    Thanks in advance.
  3. 2COR517

    2COR517 Epic Member 5+ Years 1000 Posts

    You don't need a wiring diagram to see if you have power to the actuator. Key on, case in 4wd. Check for voltage at the actuator plug. Use a voltmeter, not a test light.

    There is a fuse in the panel labeled 4wd (or something like that), and a switch on the transfer case. That's it.

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