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Wiring harness charge circuit available??

Discussion in 'General Chevy & GM Tech Questions' started by dgajr, Aug 29, 2009.

  1. dgajr

    dgajr New Member

    2004 Suburban with the factory wiring for the trailering package. I would like to charge a battery on a trailer as I tow it.

    Does anyone know if these trucks came with a charge circuit prewired that I can use in the existing 7 pin harness.


  2. Jimmiee

    Jimmiee Epic Member 5+ Years 1000 Posts


    You have to run a fused wire from the battery back to the plug.
  3. dgajr

    dgajr New Member

    There is a red wire to the trailer connector identified as a "BAT". It is a larger gauge than the others (looks like a #12 awg). There is no voltage on it, even with the ignition on.

    I would think this terminates somewhere, hopefully in the fuse box.

    Anybody know?


  4. Jimmiee

    Jimmiee Epic Member 5+ Years 1000 Posts

    Look in the Power Distribution Box for a missing fuse. The truck is delivered without this fuse and you need to install one.

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