no interior lights work !!!!!!!!!!!!

[ridinlow41]

all my exterior lights work fine but i have not one light working in the interior of the car not one , then one day i was drivng home and out of no where my lights worked on the instrument cluster but then they went off again any ideas? i already replaced both the light switch and the dimmer switch checked fuses and im stumped

 

[pontiacgp]

I'd start looking for a problem with a ground...

 

[86 regal]

might have to just start tracing from the fuse to switch then to the lights, usually something stupid like a bad ground or a wire that pulled out somewhere, good luck!