Interior lights won't go off when doors close

cadillac
deville
coupe

#1

When car doors are opened and then closed, interior lights will not go off–until I unplug battery cable. Then they go off and stay off until doors are opened again. I have replaced both door light on/off switches.

Do you have a suggestion?


#2

What year Cadillac?


#3

If the interior light is the “old fashioned” type on the ceiling of the car, it likely has a three-position switch–off, on continually, and on when doors are opened/off when doors are closed. If you have this type of light switch, and if anyone recently “played” with the switch, it could simply be in the wrong position.
Yes, I know that this is overly simplistic, but sometimes the really simple fixes are the ones that work.


#4

1980 Coupe de Ville


#5

1980 Coupe de Ville


#6

Since you have to remove the power to the lights in order to turn them off I assume there is a light control module for the lights. It may normally dim the lights down when the doors close. I would suspect the trouble is within the module if there is one.