On mine, it was the cable that had failed. Stripped off wheels, undid screws, opened up to show spade terminals on block. Took these off and checked (with a meter), and found the live feed was duff. Discon cable and spring ratchet feeder, added new (rated) cable to conn block I had, tested, ok. Refitted everything back, this time securing non-return cable to case with nylon ties attached to cable entry slot, and away we go. Looks like the motor not burned out yet. Cable now has to be stowed in a loose reel when not in use. Never did like the "in machine" storage because of overheating of the cable under load.
Lewcee42, Park Gates, Poole, May 2013