How to fix door ajar and domelights remain on

No , Why ? The lift gate door ajar light is controlled by the lift gate module or BCM . These modules have their own power supply . Now what problem are you having ? no ajar light showing on the instrument cluster when lift gate is open ?

Cud hav a module out that controls diff devices..git a datastream or scan done to target area..dont go tua dealr

I assume the ajar light comes on if you open the rear gate? Try to duplicate the problem with the car running and parked, and you pulling on the gate. Sounds like the door or close switch needs adjustment.

Hi, if you have a cargo lamp switch and a tailgate ajar switch. disconnect both power connections. If problem persists the fuse/junction box/ body control module for the Grand Cherokee and or a short in wiring harness or pigtail to ground. Just remove lift gate panel exposing the lift gate switch disconnect wire plugged in to trigger. there will probably be more than three wire connections as you have keyless entry (key fob) and alarm system. Luck being one wire for dome and cargo. This way all other systems are not effected and your problem solved. unless a bare wire touching ground from being crushed between rear body and tail gate shutting.

Is there perhaps a problem with the dome light switch on the lift gate? Close all the doors, open only the lift gate and find the switch on the lift gate frame (usually a rubber covered "bump") and press it in. You might have a loose wire shorting against the bodywork or the door is not depressing the switch properly.

First, some people do not know that the domelight can be turned on by using the headlight control. If it is all the way to one side, the dome lights will turn on.

The Relay for your Theater dimming lights may be stuck. Aside from this, a doorjam switch may be bad. Some switches usually show door ajar, but some switches have more wires and could possibly short while failing to post a door ajar notice.

You can get free wiring diagrams and Relay box info at Autozone.com by registering your vehicle. Also check the dome light itself as many have 3 positions now off, door activated, and constant on.

This problem is caused by one of the door ajar sensing switches being defective, it is a common fault in Many Ford cars and light trucks. Each door has a switch and two at the tail gate door. The switches are attached to the side of the door latch and very hard to replace, since you would most likely have to detrim at least two doors to find the bad switch the most prudent thing to do is have the dealer scan the door ajar waring system, the scan will indicate exactly which switch has the problem.

I read a service bulletin about door ajar light and power locks cycling while driving which i assume might actuate dome light as well.... rec. fix per service bulletin adjust "swing gate " striker

Good Luck

ford have a inner switch that does not work with the door switch dome light. one of the switch could be broken.. most of the time it is the rear tail gate that give the problem..

the problem is the lift-gate ajar/courtesy light switch that is located on the left and right latch assemble of the lift gate, they stick and cause this concern, there are numerous technical service bulletins from Ford about this, have replaced at least 100. PS, washing the engine had nothing to do with it, u can try using spray lube on the latch's and open and close the gate repeatably to see if the switch un-sticks.