There's a gremlin in my '97 TownCar with digital dash. With headlights off, I start the car and all's good with dash lights, speedo, gauges etc. When I turn the headlights on - all the dash lights go out. No speedo, temp, etc nothing, all dark. Turn headlights off and dash panel re-lights. Guessing it's the switch. How do I replace the switch? Believe it's the F7VZ-11654-AA type. Is it front loaded or am I ripping the dash apart? Any info is good info, thanks in advance.