When I activate my panel switch for my bilge pump I blow the 5 amp fuse in the fuse panel. Any suggestions as to where I start to diagnose this problem will be greatly appreciated.
Check the pump and make sure it does not have something inside stopping the pump from turning.
Turn it by hand and see if it turns freely.
Also Check the wires to the pump and make sure they have not worn a bare spot where it can hit some metal.