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old western plow pump keeps running

Discussion in 'Truck & Equipment Repair' started by Fred Bear, Feb 1, 2014.

  1. Fred Bear

    Fred Bear Junior Member
    Messages: 7

    I have an old western Isarmatic snow plow that was gave to me. It's on an 78 suburban. I just replaced the solenoid and everything seemed fine. But after I got done plowing today the pump just kept running. Even with the ignition off. I had to hurry and remove the battery cable. What might cause this?
  2. dieselss

    dieselss PlowSite Fanatic
    Messages: 11,392

    Ck the 2 small wires at the solenoid. One is pwr, the other is your gnd signal off the controller. Might have a bad cable
  3. basher

    basher PlowSite Fanatic
    from 19707
    Messages: 8,993

    Look for a pinched/frayed wire between the controller and the 12v M.S. look at were it passes though the firewall closely.

    The 12 v MS is ground activated
  4. Sbdrums24

    Sbdrums24 Junior Member
    from 23238
    Messages: 5

    Or something broke inside your joystick controller and the wire is staying grounded....
  5. quigleysiding

    quigleysiding PlowSite.com Addict
    Messages: 1,129

    Try tapping on the silenoid might be stuck .Might have got a bad one.
  6. Fred Bear

    Fred Bear Junior Member
    Messages: 7

    thanks everyone. I got it fixed. It was a bad solenoid. What I did was unhook the small wire at the solenoid and touch the battery cable to the post. Motor kept running so I figured it had to be the solenoid. Did an Ohm test across the 2 big posts and yup, it was closed.