Door ajar light wont go off

Try cleaning where where the door meets the car. If you look on the car door you should see some type of latch that keeps the door shut and locked. Try cleaning the latch.

Try this cure, buy a can of brakekleen and a can of spray white lithium grease, spray the latch area, thats the claw in the door where it closes, spray liberally with brakleen, open and close the door 5-6 times, repeat, then spray with the white lube, open and clode the door 5-6 times. Reapeat on all doors...

The buzzer is located behind the dashboard. The switch for the buzzer is located in the door locking mechanism on the door !

Before you replace anything spray the latches good with wd-40 or similiar. Open and close the doors thirty times or so and it will probably take care of it.

The switch is located on the door frame pillar where the hinges are on the door to chassis?

So sorry. I gave you the wrong info in my last post. It is correct this time. Hope this makes up for my mistake !

Interior Lighting
The interior lighting is broken down into two groups: the courtesy lamps and the illuminated entry lamps. Both lighting features interact with the courtesy light arbitrator. The battery saver is also listed.
Courtesy Lighting
The courtesy lamps consist of the dome lamp and/or map lights. The courtesy lamps can be activated by the GEM using the panel dimmer switch, or by any ajar door. The courtesy lamps will shut off when the doors are closed and the illuminated entry feature is not active, or when the vehicle speed is greater than 8 kph (5 MPH). The interior lamps will not be reactivated until the vehicle speed is less than 5 kph (3 MPH) and a new door open warning lamp switch signal is received. The inputs are:
ignition switch position
driver door ajar switch
front passenger door ajar switch
rear left door ajar switch
rear right door ajar switch
Vehicle Speed Switch (VSS)

The outputs are:
battery saver relay
interior lamp relay

DOOR AJAR SWITCH
Removal And Installation
Remove the front door latch. For additional information, refer to FRONT DOOR LATCH.
Remove the door ajar switch.
Lift the locking tab.
Rotate and remove the door ajar switch.
To install, reverse the removal procedure.

FRONT DOOR LATCH
Removal And Installation
Remove the front door trim panel. For additional information, refer to INTERIOR TRIM AND ORNAMENTATION.
Remove the watershield.
Remove the bolt and the door glass run rear channel.
Disconnect the front door latch control cylinder rod from the door lock cylinder lever.
Remove the exterior door handle actuating rod.
Unclip the exterior door handle actuating rod.
Remove the exterior door handle actuating rod.
Remove the front door latch screws.
Disconnect the interior lamp switch and the door ajar switch electrical connectors.
If equipped, disconnect the power door lock actuator electrical connector.
Position the door latch assembly aside.
Remove the front door latch cable watershield.
Remove the front door latch cable.
Remove the cable conduit from the door latch.
Disconnect cable from the door latch.
Remove the door latch push button rod.
To install, reverse the removal procedure.

Try this before we go further,
Spray both door latches with wd- 40 or similiar, opening and closing the doors between soaks.
That may take car of it.