I have a 2009 Impala the headlight won't shut off.
Check the low beam headlight relay to see if it is stuck in the on position. Just unplug it to see if the lights go out. Or the high beams relay which ever lights are not being turned off.
It could be other issues like the headlight switch, body control module, DRL/PCB relay, or wiring issue.
These suggestions are for when the key is turned off and engine not running as how you are explaining the problem.
Where is the relays located at.iv? Already changed the headlight switch and the body module.
The relays are under the hood in the fuse compartment. Check your owners manual it will explain where it is.
no headlight relays in the fuse block.
The fuse block under the hood is on the right side engine compartment labeled #1.
1 - Fuse Block - Underhood
2 - Generator
3 - Brake Fluid Level Switch
4 - Battery
5 - Inflatable Restraint Front End Sensor - Right
6 - G100
7 - Horn Assembly
8 - Windshield Washer Fluid Container
9 - Windshield Washer Fluid Level Switch
10 - Windshield Washer Fluid Pump
11 - Battery Current Sensor
12 - G102
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