Dome Light Stopped Working When Doors Opened

#1
Hello! Last week my dome light stopped working with the doors. It functions fine when using the switch on the light itself.

I think I've eliminated the possibility of a door switch because 1) same result with all doors, and 2) the "door ajar" light on the instrument panel still lights up when a door is opened.

Also, when adjusting the dimmer switch (aka rheostat) I believe the dome light is supposed to turn on when the dimmer switch is turned to the uppermost position, even with the doors closed, no? This doesn't happen. The dome light won't turn on regardless of the dimmer switch position. Right now I'm thinking it must be the dimmer switch but thought I would see if anyone else had any ideas or experience with this.

Thanks! :)
 
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