That happened to me recently on the 90 coupe. For some reason the chimes went out (pretty good reminder, to turn your lights out before you walk away from your car, all day, to go to work inside). I remembered I needed to fix it when I got home. I got the FSM, assembled all my tools, even cooled the garage down (My wife bought me a window unit for my birthday). I got in the car, put the key on access. and flipped the lights on. When I opened the door to get out, you guessed it, the chimes reminded me that I left the lights on. For insurance I left the FSM on my work bench where the car could see it, for a few days. The chimes have worked ever since. Murphy! I got you this time.