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Western light harness

Discussion in 'Western Plows Discussion' started by FourDiamond, Nov 5, 2015.

  1. FourDiamond

    FourDiamond Senior Member
    Messages: 130

    I'm installing a 4 port isolation module on 1997 Chevy 3500. Most the install in straight forward, but I'm having trouble with the two light harnesses. Each one has a male 3 prong connector, female 3 prong connector, a purple wire and a brown wire. The female connector is for the headlights, the purple for turn signals, and the brown for parking lights. What is the 3 prong male connector for?? Thanks for any insight.
  2. dieselss

    dieselss PlowSite Fanatic
    Messages: 11,390

    That's to plug into the truck light harness
  3. mishnick

    mishnick 2000 Club Member
    Messages: 2,353

    You have to unplug the OEM headlight plug from the bulb and connect it to the Western harness then plug the other three pin plug into the light. When you turn on your headlights power goes from the OEM plug up to the isolation module where it decides weather to send power to the truck (no plow connected) or to the plow if it is there.
    Note that on the four port module the other end of those two headlight harnesses (where they plug into the module) might need to be switched to get the signals to flash on the correct side.
  4. FourDiamond

    FourDiamond Senior Member
    Messages: 130

    Thanks for the help. It makes sense now.