I could be wrong but for some reason I thought the power tops were run through a resetable circuit breaker not a fuse. I looked at the Wiring Digram and couldn't find either.

Anyways, I would take voltage measurements at the motor with the motor running to see if it is dropping too much during operation (I would expect ~11 V or better with the motor running). If it drops too much, you either have a high resistance connection or a suspect motor. After that I would bypass everything with a suitable fuse (based on the circuit breaker or fuse size) and see if you can raise the top on this bypass jumper. I would use 12 AWG. If it raises ok, you have a connection isue. If the fuse pops, the motor is probably bad.