08 Silverado No aux power to 7 pin plug

Discussion in 'Audio, Video & Gadget Tech' started by ffsmiley, Dec 13, 2010.

  1. ffsmiley

    ffsmiley New Member

    I am trying to get aux power to my 7 pin rear plug for charging trailer batteries, so I installed the 40 amp fuse and connected the red/blk wire from the wiring harness between the fuse box and fender well to stud 1. I am getting a good voltage reading at stud 1 in the front of the fuse panel after 40 amp fuse was installed but when I go to the rear bumper and check the voltage in the 7 pin plug I get 0.00. Any suggestions Please help.
  2. ghotachevy

    ghotachevy Rockstar ROTM Winner

    Thereils another wire den there one is trailer brake other
    aux pwr
  3. wayned

    wayned Rockstar 100 Posts

    not for charging trailer battery's it will kill your starter batter battery.read your manual( auxiliary battery)

    wire for 7 pin hooked up+ wire I added. brake wire on right.

  4. ffsmiley

    ffsmiley New Member

    Thanks ghotachevy and wayned found it and it works like a charm

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