03 f250 I can't find the switch that turns the interior light on and off when you open and shut the doors my interior lights are on and want go out also showing open door on gauge cluster? Thanks for any help

 

The door ajar switch is integrated into the door latch. Soak the latches down well with WD-40 then open and close the door a bunch of times. Often this will free up the switch.

 

Thanks. It worked. And is working correctly now. Thanks for the help

 

I also have this problem, but think its beyond wd-40 fix. I've soaked latches with every type of penatrant oil and spray lube we have in our shop and at my garage and have had no results. I've noticed the dome light only comes on when driver's door is opened but none of others. If I open any other door the light doesn't come on unless I press the door unlock switch. Door ajar light remains on while driving, dome light doesn't shut off until speed exceeds 5mph in forward gear ( kinda makes reverse in the dark a bitch) and dome light stays on for 15-20 minutes after I exit the truck. I think is time to look at other solutions.

 

That's where I was lastnite but a little oil fixed mine sounds to me like you may have a wiring problem if the light doesn't come on till you unlock the doors or possibly in that switch. Just a guess

 

I had this problem on a 2002 Explorer except it was more than just the dome light, the alarm would go off in the middle of the night for no reason!

Anyhow, it was beyond the WD-40 fix so I swapped it out. The part was only around $20 but I had to remove the door panel and door latch to get to the underside of it where the switch was. With the latch out it was easy to replace -- disconnect the wiring and a simple 1/4 turn twist to remove the switch.

 

Do you know how many wires go into the switch?

When this problem happens to mine, I plan on installing regular switches from a wreck (other than Ford) & rewire it so it never sticks again. I got switches from an old Toyota, and all they have is one wire going to the switch. Must be just the ground.

 

If they only have one wire it should be a hot wire and grounding itself threw the nut on the switch

 

I just had mine apart on my 2005 to replace the switch, I'm almost positive the switch harness had 2 wires so the ground must run back through the wiring.

 

There are two wires to the door switches, but one of them is just a ground wire. The grounds probably go back through the door conduit to a frame ground somewhere inside the truck. Using the door itself as a ground path wouldn't work very well, because of the plastic bushings in the door hinges.

If you wanted to use single wire pressure switches, you probably could. You would just need to run a ground wire from the door framework through the conduit to a good cab frame ground.

See the attached door switch diagram.

 

The light stays on for 15-20 minutes because it is sensing the door open. It is on a timer and will shut off to conserve the batt. Now im sure it is sensing the door open because of the problem in the switch or wiring as you described.

the door unlock switch turning on the light with the pass door, im sure turns on the light because it is in the "timered off" position from the last time you left the truck, and it has been more than 15-20 minutes. you kind-of wake it up.
i would bet you dont have a wireing problem, but just unlucky enough to have two door switches go out... one sticking open, and one just broken,

I may be wrong, hope this helps, Mark

 

On my truck the light relay broke and since I always wanted to have manual switch, I just made spade connectors for the relay plugs and added manual switch on the dashboard.
Problem solved permanently.