How do you troubleshoot and fix a 'door ajar' 'dome light on' 'buzzer' on a Ford Explorer all models?

Troubleshooting

Go sit in your truck and close all the doors. Light stays on right? Put your key in the ignition. Does the chime start going off when you put the key in? If so, door switch or the GEM thinks a door is open.

To find out which door... Leave the key in the ingntion. Turn to the on position. Even with doors closed, chime sounds once after a few seconds and door ajar light comes on and stays on right? Open each door one by one. The chime should sound each time you open a door. When you find the door that doesn't make the chime sound when you open it, that is the problem. (Don't forget to try the rear hatch and the hatch glass also!) To determine if the switch is bad or if the GEM is having a problem thinking the door is open, just unplug the suspected switch, close all the doors, and see if the problem stops. (don't forget to wait a second to give the lights time to go off) If unplugging the switch solves it, the replace it. If it doesn't, Ford can check your GEM to see if it is the problem.

Accessing a switch

The switch is located in the latch assembly. Try sprayiny a lubricant (WD-40) or cleaner (carb cleaner) into the latch assembly and open/shut the door several times. This should loosen the dirt build up. The hatch adjar switch should also be located at the latch and again try doing the same thing to it.

Sensors

The sensors are in the door latches.

Buzzer location

Under the driver side dash, search for a bright orange 'solinoid' like deviceroughly 2 inches long and 1 inch around (it maybe about one inch square). Look while the alarm is sounding. Unplug the alarm. Tape the ends of the exposed wires.

First answer by Nolimitssjca. Last edit by Nolimitssjca. Contributor trust: 458 [recommend contributor]. Question popularity: 155 [recommend question]