I HAVE A 91 RS 305TBI AND I AM HAVING ELECTRICAL PROBLEMS. RECENTLY MY HEATER CORE WENT BAD AND WAS LEAKING SO I PARKED IT FOR THE REMAINDER OF WINTER UNTIL IT WAS WARMER AND I COULD REPLACE IT. WHEN I STARTED IT UP THIS SPRING I NOW HAVE NO HEADLIGHTS, DASHLIGHTS, DOME LIGHT, AND MY POWER HATCH ISN'T WORKING. I FIGURE IT COULD BE THE LIGHT SWITCH SINCE THAT CONTROLS ALL THAT EXCEPT THE HATCH. I KNOW MY PARKING LIGHTS ARE GETTING POWER BECAUSE WHEN I SET MY ALARM THEY FLASH LIKE THEY ARE SUPPOSED TO. ANY HELP WOULD BE MUCH APPRECIATED THANKS, JOE

 

Make Sure you have no blown fuses, should be the first step! Did you change the heater core your self, if not you might have to go and make sure that they connected all the plugs in and put the grounds back on