When the turn signal was on in either direction, all 4 directional lights would come on and stay on without blinking. This led me to believe that the turn signal relay was not working correctly. I ...

See All 5 Photos The turn signal switch on 1994-2004 Mustangs does more than just operate the turn signals on your Mustang. It also controls the windshield wipers and houses the hazard flasher switch.