Cadillac Seville / Cadillac Eldorado Forum Discussion, STS 2001 interior lights problem in Past Cadillac Vehicle Discussion; Some of interior lights don't work But doors lighting works
I mark it withe red pin
The problem began ...
I had this exact same situation happen on a 2006 Escalade I installed an aftermarket radio into. I touched a wire on the harness to something (very vague memory) and I lost nearly all the same lights. I never did figure out what fuse or circuit controlled the lamps that died before I sold it unfortunately. But to echo Ranger's point, it was almost definitely your radio work that blew something on that circuit.