Join Date: Feb 2006
Location: SoUtHeRn ILLiNOiS
I would say to check the driverside fuse box. I believe fuse 9 or 10 operates interior lights on a TL(I dont remember exactly). There is a fuse on the passenger side fuse box that controls some interior lights(on a TL). I would guess that a CL would be setup similarly. CHeck the owners manual. Other than that it may be the switch itself (loose, dirty, burnt, or absent connection). I would SUSPECT it would be easy to find a cheap replacement switch to test the switch scenario (ebay, etc.). Good Luck.