Hi Guys:
I had the headliner on my 87 740 redone by a shop around me . Now the
overhead light does not turn off when I shut the door(s). I have to turn the switch to off position to avoid a discharge in the battery. The connections
in the unit look to be ok. However something must happened when the upholsterer reconnected the unit becaused the nbr. 5 fuse was burned.
I dont know if the light unit is damaged or if he did not connect the wires
that come up on either side just above the rear doors. I'm mentioning this because I saw these wires popping up(disconnected) when I looked at the inside of the car as old headliner,board,side plastic mouldings had been removed.
Is that a way to test the light unit to find out if it's in good condition?
I really wanted to avoid a new trip to the upholsterer and ask him to check the interior connections,when the problem might be the light unit itself...
Unit was in perfect working condition,before job was done.
Tks for any ideas.

If the light had two wires to it then the ground for the light is routed down and through a contact switch in the door jamb swhich goes to ground when the door is open. It is possible that they put a screw through the ground wire so the light thinks the door is open. This also makes me think that they might have hit the hot wire on one attempt and blew the fuse, second attempt missed the hot wire and hit the ground. Also see if you can take the light down and check the mounting screws to make sure they havent pinched or penetrated the wires. (the easiest way to start checking. Beyond that they might have to pull the headliner back enough to check the wires.