If the parking lights on a 1997 GMC Jimmy won't shut off, it could be due to a faulty headlight switch, a malfunctioning relay, or a problem with the wiring. Additionally, a stuck or damaged parking light switch might be causing the lights to remain on. Checking these components for proper function or any signs of damage can help diagnose the issue. If necessary, consult a professional mechanic for a thorough inspection.
Check the adjustment of the brake light switch.
grand marquis
There are a number of reasons why your parking lights won't turn off. There could be a wiring problem in the system.
Of course.
that means your battery will be dead in the morning
becaus the 2004 Chevy impala does not have automatic lights and they have to be turned off manually
check for short to power in the circuit
Check the brake light switch adjustment.
on the back of the car
There is a switch for that. It is in the dash illumination brightness control switch.
On my 1996 suburu there is a switch on the top of the steering wheel/column that is a toggle for the parking lights on/off. I accidentally hit it one day while cleaning my car and it took me hours to figure out how to turn the parking lights off...oops that lil switch i never touch got bumped and i didnt realize it.
Daytime running light module may be the problem