depends on which lights? inside over head? /Dash board?/Doors? /front headlights?/Flashers?/ turn signals?/ Backing lights?/ Parking lights?/ So which ones ? what Year??
Probably the turn signal flasher
because there are two diffrent flashers 1 for the flashers and 1 for turn
The only thing that will work with key OFF is the brake lights,head lights and emergency flashers. Dome light will also work.
this car may have separate flashers for the turn signals and the emergency flashers
in dash lights
its either the flasher or the turn signal switch
Probably a wiring issue between the turn signal and the lights.
4 way flashers and turn signals both have a "flasher can" in the system to make the lights flash the turn signal and 4 way flashers are controlled independantly of each other try replacing the flasher can for the 4 way flashers it is obvious that the bulbs are ok because they work on turn signals
Replace the Flasher Relay.
you may have blown the computer chip that regulates your lights its usually your hazard lights button that's the chip.
believe it or not you may haveblown fuse check them.