Posing wiring question. My fan came with a temp switch, for the intake water crossover, that creates a ground when it's temp is reached. So...if I wire that to the fans ground wire, then wire the fans positive ( with fuse) to a battery hot source I should have a working auto on-off fan. Right? Then...if I wire in an on-off toggle switch, one wire spliced to the ground and the other to ground I would have a manual on, right? It would make the ground should the temp switch fail.