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F250/F350 Supercab door ajar light


Junior Member
SW Colorado
I have owned both a 99 F250 and a 00 F350 Supercab and have trouble with the door ajar light staying on even when the doors are firmly closed. It is intermittent. Is this a known problem? Where is the contact switch in the door that activates this light?


Senior Member
winterset iowa
door ajar light

Its been a while since I have worked on any of those trucks but if I remember correctly there is a switch on the door latch that turns that light off. I cant remember if you have to replace the whole latch or just the switch on the latch.
I'll do some research and post back later.

Good luck
Mark K

Chuck Smith

2000 Club Member
It also happens on the 2000 Ranger extended cab I drive at work. Sometimes when making a turn the light comes on. Doors are firmly shut. I have learned to ignore it.

Been There

I had the same problem with my 99 SD Ext. cab. What happens is the grease in the door gets tacky and prevents contact(not to mention build up of road grime etc.) take WD40 or I use PB Blaster and spray the door latches and into the latches on the drivers and passenger doors, this will clean the contacts and should fix your problem.