Ford has these really trick upfitter switches on the dash that control power to four wires that end under the glovebox area. We tapped the switch terminal from the Baja Designs harness into the No. 4 switch for a superclean wiring install. Right above the switch we added the Baja Designs momentary switch, which dims the lights or makes them strobe. Perfect should our friend find trespassers on his property after sunset.