Do as Dave suggested. If the fuse is blown...go an auto parts store and buy a 50amp circuit breaker and install it....not a fuse. Take the fuse with you so you get the right size circuit breaker. Next, make sure that you are not running the landing gear all the way up while still holding the switch. That will blow the fuse everytime. When you get it working again....run it down about 3-4" and use something to mark that spot.....paint, magic marker...something that wont wash off. Never run it up past that mark again. Also, good battery voltage is a must unless you are connected to your TV (running) or shore power. My 5cts. (inflation)