On the 2004 4-door Alero (cannot vouch for any other year or body type) the driver's door switch is integral to the door-lock mechanism. You must remove the door panel to access this mechanism.
Check the label on the drivers door jamb for proper pressure.Check the label on the drivers door jamb for proper pressure.
it is in the fuse panel in the drvers door jamb .gmjim
The ajar switch is part of the latch, inside the door.
On the door a few inches below the latch assembly...
how to relace a door jamb switch in a 1994 f150
where is door jam switch on 2004 f150 xlt located
on the lower corner of the front door post on both sides.
If it is not visible at the door jamb, it is probably located in the latch mechanism
If the switch is bad or out of adjustment, then the door ajar light will stay on. The overhead light will not go out, and the security alarm will not set.
Door jamb switch is defective light switch is defective or not turned off.
Probably a faulty on-off switch in the door jamb, or a misaligned door which fails to close the connection.
I suspect a faulty door jamb switch; remove yours and test for power at the switch. Start with the drivers door. This could also be a faulty acc relay. with the driver's door open, press and release the door jamb switch, do you hear a little click noise from under the dash? if not, you may need to replace your relay