Re: 2003 Mustang GT Problem with interior light
My 01 did the exact same thing, it turned out to be a sticky door switch. In our cars the switch is located on the latch itself inside the door. The switch was $25 from Ford and took about 1 hr to replace.
2001 GT AUTO, MAgnaflow Cat back, 70mm TB, K&N FIPK, C-springs, 275/40/17 all around