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Old 07-21-2019, 12:53 PM   #3
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Join Date: Apr 2018
Location: Nebraska
Posts: 557

If it does the opposite when the leads are changed then the problem is narrowed down to the power going to the motor on one set of leads. That would be a controller issue. Sounds like bad contacts in the reverse polarity controller/switch. It's usually the switch because it gets most of the abuse. Like a power window switch.
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