does the entire light come on, or just the map light, when you slide the switch?
on mine, the light quit working, but the door lights still come on. and the map light comes on. I think I have a bulb out, but I've not figured out how to take it apart yet.
and I'm too stubborn to ask on here how to do it.
fear not, I have a parts car to disassemble without fear of breaking it.

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 560SL convertible
1987 190D 2.5-5SPEED!!!

1987 300TD
2005 Dodge Sprinter 2500 158"WB
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!