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Western plow no left low beam

Discussion in 'Truck & Equipment Repair' started by concretejake, Jan 24, 2016.

  1. concretejake

    concretejake Junior Member
    from Pa
    Messages: 2

    Have issue with no left low beam on plow side 4 port mod swapped port 4 to 3 and no low beam on either side. I have power at green and yellow wires going into port 3. Is my mod bad or am I missing something with wiring. 2011 GMC Sierra 2500 btw everything worked last season
  2. Philbilly2

    Philbilly2 PlowSite Veteran
    Messages: 3,797

    assume you have already checked the filament in the bulb?

    Just have to rule out the obvious before we go deeper
  3. concretejake

    concretejake Junior Member
    from Pa
    Messages: 2

    Yes I checked the bulb. I think it might be the harness, but I tried swapping port 3 with 4 and right low beam went out. I hope it's not the mod
  4. Randall Ave

    Randall Ave PlowSite Veteran
    Messages: 3,593

    The headlamp works on the right side? Did you check harness with s test light. Do you have an ohm meter?