The motor on our rear stabilizer jack only lasted a year - cable was to tight on the motor and it came disconnected in the motor - at least that is what I think It was replaced under warranty. New motor is about $300.00.
I found the auto reset breakers but have not located our fuse either.
Found this in the manual
Step 1 - Attach voltmeter (or test light) leads to the motor leads. Does the meter indicate 12V DC?
If YES, see Step 2; if NO see Step 3.
Step 2 - If YES, at the motor, check the incoming leads to 12V DC (if necessary,disconnect leads at wire splices). Does meter indicate 12V DC? If YES, motor needs to be replaced. The motor is not field serviceable. DO NOT ATTEMPT TO REPAIR. If NO, Inspect all wires and connections between the wall switch and the motor. Repair connections as necessary. Recheck as in Step 1.
Step 3 - If NO, Inspect all connections between battery and motor. Inspect 6A Auto-reset Circuit Breaker and 20A Fuse. Recheck as above in Step 1.
Since there are no field serviceable parts in the motor, electrical troubleshooting and service is limited to replacing only those components as previously outlined. Thorough inspection of wiring and connections is the only other electrical service that can be performed.