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Plow lights out?

Discussion in 'Fisher Engineering Discussion' started by tjkcreations, Oct 17, 2010.

  1. tjkcreations

    tjkcreations Junior Member
    Messages: 11

    Just picked up an F250HD with a MM1 setup on it. The truck headlights are on but the plow lights will not come on. The marker lamps are working but the driving lights are out. Switch under the hood? Relay? Thanks for any help in advance.
  2. bob00

    bob00 Senior Member
    Messages: 143

    i am not an expert but i think they use the old systme without isolation module

    if they use older light control its basacly a relay with a switch inside the cab sometimes they hide it under the dash the best way is to follow your wire
  3. GPS

    GPS Senior Member
    from MA
    Messages: 268

  4. tjkcreations

    tjkcreations Junior Member
    Messages: 11

    Found the relays (there are 2 of them. Should I just replace? Anyone know the P/N's?
  5. tjkcreations

    tjkcreations Junior Member
    Messages: 11

    All set. Thanks for the Help. Just the low beam relay is out.