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Fisher Plow will not move, just relay click

Discussion in 'Truck & Equipment Repair' started by capeless, Dec 5, 2009.

  1. capeless

    capeless Junior Member
    from Maine
    Messages: 2

    I have a 99 Dodge Ram with a 8' Fisher MM1. When I try to move the plow the motor relaw clicks. I just replaced the motor relay. I am getting corrent power readings on th erelay. I run a jumper from the battery to the motor and the motor runs. If I disconnect the positive cable from the plow motor I get 14v with the truck running and everything connected. When I re-attach the positive cable I get 0v. This is a 10 year old plow but I have gone through and cleaned the electronic connections. Any ideas of what to try next?
  2. Crash935

    Crash935 2000 Club Member
    Messages: 2,377

    First try opening up the pins in the power cable. Next try jumping across the large terminals at the motor solenoid, if it works then its a solenoid.
    If that didnt work, using jumper cables, disconnect the power cable and hook the jumper cables up with ground from the motor to batt and pos from motor to power out large terminal at the solenoid. If that works you have a break in the power cable.
  3. streetfrog

    streetfrog Senior Member
    Messages: 337

    solenoid is bad. or the little wire coming off it to battery is connected to the wrong polarity
  4. mansf123

    mansf123 Senior Member
    from mass
    Messages: 817

    could be your controller... does the motor make noise?
  5. lofsfire3503

    lofsfire3503 Junior Member
    Messages: 16

    also check for the ground
  6. capeless

    capeless Junior Member
    from Maine
    Messages: 2

    Turns out the power cable pin on the plow side was slightly cracked. When I spread the pins it snapped in half. I was still getting power to the lights and 12v to the pump, just not enough amps to run the pump due to broken pin.

    My buddy used some 4guage car amp wire and made me up a connection until I can buy a new plow side power connector.

    Thanks for the help!