Frankly, we are mechanically challenged but understand the comments above. Have not checked the ground wire. Have been looking for the circuit breakers for the battery and cannot find circuit breaker and/or fuse. This all started when we had to have the Purasan reworked. The system was empacted, got that fixed but then the mixer motor and circuit board in the Purasan system had to be replaced. All that was done and seemed to have messed up the solenoid in the area that feeds the windlass, the freshwater pump and the Purasan water supply. More than $1K later we still don't have cuddy head and have lost windlass and fresh water pump. 2003 50x16 Gibson Houseboat for sale LOL