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Fisher MM2 No Directional or Parking Lights

Discussion in 'Fisher Engineering Discussion' started by 04f250xlt, Jan 2, 2009.

  1. 04f250xlt

    04f250xlt Junior Member
    Messages: 28

    I noticed on New Years eve that my Directional and Parking lights were not working on my plow, headlights High and Low are working perfectly. The Headlights and Parking/Directional are on the truck are also working perfectly.
    I just cleaned/re-greased my connections between the truck and plow and replaced and greased 2 of the bulbs and still nothing. :realmad:

    I am a firm believer of preventive maintenance, change my oil annually, greasing all my pins and locks, new cutting edges, etc. and haven’t had a break down in 5 years. :)
    So know I am stumped and thought I better turn to the experts on were to start trouble shooting the problem.

    So Lady’s and Gentleman what are your thoughts??

    2004 F250/2003 MM 2 Fisher 8' HD
  2. 04f250xlt

    04f250xlt Junior Member
    Messages: 28


  3. 04f250xlt

    04f250xlt Junior Member
    Messages: 28


  4. um did you look a the bulbs it might be blown or their might be not good ground or bad connection in though the wires or maybe relay system
  5. timmy1

    timmy1 Senior Member
    from RI
    Messages: 470

    Yes, check for power at the bulb sockets first (positive inside center). Check continuity between the socket housing (ground) and negative terminal on truck to rule out ground issues.

    If no power, without a wiring schematic, with the parking lights on only, check for power with a test light or multimeter at each pin truck side. Then, repeat with the parks off. If you have power at one parks on and no power parks off, you found the conductor.

    Then check for continuity between matching pin in plow harness back to center of light socket.

    This will get you started.
  6. Crash935

    Crash935 2000 Club Member
    Messages: 2,377

    Im guessing your running a iso mod? If so, there is a P/T fuse in the harness about 6" from the iso.