I like Ford reliability, but their trucks lack features that make a
Working man's day easier. Anytime I roll down my driver side window and
hit a few bumps the door ajar light stays on, along with the inside
light. I am also SICK of the key buzzer.
I have a 98 f150 and i had the same problem with the door ajar and dome light....tried the wd-40 and that solved the problem. But, the buzzer goes off every time i open the door (even if the lights are off and the key is out of the ignition)..DRIVES ME CRAZY! is there anyway to get the buzzer to go off only if the lights are left on or is it all or nothing?
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Re: 1998 F-150 Door Ajar Light Problems
Inside the doors is a Small twist in button switch on the door latch assembly that turns on the doom and key buzzer, they stick and make a poor connection, this causes your problem, i have replaced 100's of them, u will have to detrim the door to get at it. The switch is about $10 and u can get it from most parts stores, here is a picture. remember there is one on each door latch.
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The central locking will not work when a door is open. find the door which is ajar and fix the door switch. Could be a stuck switch (either open or shut) May just need a whack with a soft faced hammer on the door frame. Don't hit it too hard you could dent the panels.
The door ajar switch is located inside the rear door face along with the latch. They can tend to get dirty and sticky over time. Using your favorite petroleum based lubricating spray, shoot it directly into the door latch area, being very liberal. Open and close your doors several times to make sure the switch is working freely. You should do this one door at a time so you can diagnose which door is causing the issue in case it resurfaces. Should be good to go.
i must say that i feel your pain with this,, my door ajar light does the same thing but my dome light doesn't come on when the doors are open, i have to flick the switch on the dome light to make it come on. In my opion and i stress my opion it saounds like a issue with the body controller, im not sure what ford calls it but it controls all the body functions, i dont think the low coolant light is connected to the body contoller but i dont know this for sure, i think that light is controlled bny the engine ecm. some times a dealer can connect to the body controller and see if there are any fault codes for circuits that it controls and or monitors, also they can reflash or update the configeration and or calibration level cause ford release's fixes for issues all the time, same theory works for any control module on a vehicle. i dont think any of the auto parts stores have the right program to connect to bofy controlers but i could be wrong, worth looking into. i only put up with mine cause i use it as a beater, if you are worried about your dome light staying on and drianing your battery then you could pull out or disconnect the dome lights for the time being, its not a fix but just a band-aid.
the door ajar light is caused by defective door ajar switch or switches, there are 6 of them and anyone can cause the problem, The Ford dealer has a scanner (called an NGS) that can read what switch is causing the problem, the switches are inside the door attached to the door latch assemlby, a real pain for a professional to replace, done 100's. The ABS is also one of many problems, once again the dealer can scan the system for the paticular part that is defecive, which most likely will be a wheel speed sensor, there is one at each wheel.
Have lost power to the passenger side door. Without power system doesnt recognize door closed because of no power to door ajar switch which keeps dome light on. Security light stays on because without power to rest of systems supplied by fuse it cannot tell if doors and windows closed to engage security features. Most common is for power wire to break somewhere near where it leaves to main body and enters the door.