Travis Johnson wrote:I used to work for Douglas Dynamics who makes the snowplow brands, Fisher, Western and Blizzard. This is just a common problem with these brands of snowplows and any distributor has the parts for these plows. It is not uncommon to have motors go out several times a year.
When I put the multimeter on ohms and touch the positive lead to the positive post on the motor and the negative lead to the body of the motor, it completes the circuit - I thought it was supposed to be an open circuit?
Mike Barkley wrote:Check the range selector switch of the ohmmeter. The higher scale will read through your body if you're touching the wrong places & look very similar to a complete short. It does sound like that motor is fried but if it was a complete short (to ground via the motor case) it would be loading the battery down hard when you did the voltage check. Or popping fuses. Or burning something.
There is continuity between the + post and the motor casing.
thomas rubino wrote:Gerry; Use an unconnected car battery, with jumper cables. Connect ground to your case and touch positive to your post. Big spark its bad … no spark might be just fine.
Have you looked at ebay? might be someone selling that model, buy the whole thing mix parts till one works.
Mike Barkley wrote:With the armature removed? Check that wire carefully. Probably a tiny pinhole in the insulation which could explain why it's not popping breakers. Hard to tell from the pix but it appears the shielding around the positive lead is deformed. Maybe it's poking into the wire???