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How to properly ground the plow side?

Discussion in 'Truck & Equipment Repair' started by YR2012, Jan 12, 2013.

  1. YR2012

    YR2012 Junior Member
    Messages: 1

    OK this is probably a stupid rookie question, please help me tell the difference between seriousness and sarcasm!
    Fisher MM1 2-plug setup.
    Seems to have a bad ground on the plow side. Periodically, we just get no power to the plow. Won't raise or lower, nothing. Solenoid chirps like a bird. Plow headlights are staying on. Wiggling the ground wire at the pump eventually fixes it. This happened 3x in the middle of a job and in the dark we got a spark the size of a softball, then the plow worked and we were able to finish.
    -- Bad connection at the screw? Bad ground wire?
    -- What's the best way to protect the ground wire and its connection? (Scrape it? Grease? What kind?) Seems like a very important and very exposed electrical connection!
    Thanks guys!
  2. terrapro

    terrapro PlowSite Veteran
    from MI
    Messages: 3,912

    How old is the plow? If metal is touching metal you should be good. I doubt it is a bad cable sense they are usally pretty heavy gauge. If it is an older plow I would bet your motor is going bad.
  3. Banksy

    Banksy PlowSite Veteran
    Messages: 3,113

    Sand paper to clean it and dielectric grease. Ground goes from pump to battery.
  4. dieselss

    dieselss PlowSite Fanatic
    Messages: 11,398

    Look at the eyelet good. They sometimes get corroded under the heat schrink
  5. gafred

    gafred Member
    from Boone
    Messages: 36

    Run a new ground cable from battery to plow motor as original mount, 1 up heavier gauge will be benefit.
  6. T-Trim

    T-Trim Senior Member
    from NE OH
    Messages: 207

    You could just check the lug on the ground cable to see if its bad. To repair it won't take much time. If its the lug. I would crimp the new lug on followed by a little soldering. then top it off with a heavy duty strink tubing.

    New lug should run you a few bucks for a pair.
  7. Spool it up

    Spool it up Senior Member
    Messages: 912

    best ground to get is to the neg side battery terminal
  8. Clint S

    Clint S Senior Member
    Messages: 280

    At the ends I have seen the wires get green and not ground well on all types of wires where the eyelet crimps in. I replace and solder the new one.