help with a component
I just purchased a 2003 launch ssv. I have a toggle switch that isn't factory on the side panel just infringe of my tranni light. It appears to . It appears one leg goes to a positive post on the battery and the other goes to a circuit board above the main breakers under the dash . The terminal connect to the board under a 30 amp fuse and it looks like its marked F3. I can't figure out what its for. Everything seems to be working. Working the switch doesn't seem to do anything. The shower isn't but the mechanic said the pumps getting 12volt so there replacing the pump. I'm at a loss and need a little help.