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MM1 non-insta act Pump problems

Discussion in 'Truck & Equipment Repair' started by TMacie, Feb 18, 2015.

  1. TMacie

    TMacie Junior Member
    Messages: 22

    This past weekend, I plowed the little bit of snow we got. When I hopped out to disconnect the plow, I noticed that the power wires were smoldering. I unplugged them and the casing was so hot that a pin pulled out a bit as well as melted the insulation right behind the connector on the plow side harness.

    I went out today to do a little testing, I put an ohm meter on the + and - of the pump. It read 0 ohms. Common electronics knowledge says that there is a short. Is there a common cause of a short in these motors? What should the resistance read on a good pump?