2002 Ford F350 with stuck Interior lights

The interior lights on our 2002 Ford E350 are on and we cannot figure out how to turn them off.

Soon the battery will be dead.

Any suggestions?

It's likely that one of the door switches have gone bad. You could try finding where they meet the door and make sure it is making contact and has good movement. If it doesn't sound or feel smooth when pushed then it probably needs to be replaced. You could confirm it with an ohm meter. A parts store might be able to help. If it is easy to get to then you probably want it unplug it until it can be replaced, otherwise remove the bulbs or disconnect the ground from the battery to prevent damaging it.

Did it go off while you were driving or did they come on when you opened the doors?

Until you can fix it, remove the fuse.

Thank you, Daniel and Eric!

The lights finally went off though I expect this to be another of the mysterious occurrences that have happened over the years.

My first thought was to remove the fuse though dear hubby said he didn't even know where they were.  Do modern vehicles even have fuses?

Next, I suggested removing the bulb though his reply was "but there are more in the doors."

My only other thought was to drive 60 miles to a repair shop.

Pearl, we cross-posted.

Any idea where the fuses might be located?

Years ago, I remember that we always had a spare fuse in the glove box.

In those trucks there is a little wheel by the headlight switch that can sometimes mistakingly be turned all the up, which keeps the interior lights on, I believe. If it does end up being a door switch, they can be tricky to install on that model, so give yourself patience, time, and some youtube video watching :)

If you just want to pull the fuse, there is a fuse schematic in the owners manual or online, the box is underneath a panel where the drivers left knee would be, below the steering wheel. Get yourself a battery powered LED for a couple bucks and mount it on the non-working factory light, or the mirror if you don't want to fuss with fixing it or pay to have it fixed.

Forgot to mention, sometimes a good soaking of PB blaster or WD-40 on the latch mechanisms in the doors, and several harsh opening/closings will free up the switch and get things working again! That is were the door ajar switch is located on those trucks.

Cole Tyler wrote: In those trucks there is a little wheel by the headlight switch that can sometimes mistakingly be turned all the up, which keeps the interior lights on, I believe.

Definitely check that!!

Fuses in my 1995 F 250 are above the driver's left knee, sort of. You open the driver's door wide, and on the edge of the dashboard that faces the door there's a panel. Mine has a thing on the inside of the little panel door that basically tells you what's on the fuse.

Cole Tyler wrote:sometimes a good soaking of PB blaster or WD-40 on the latch mechanisms in the doors, and several harsh opening/closings will free up the switch and get things working again! That is were the door ajar switch is located on those trucks.

REALLY good idea!! After you spray them well, open and shut the doors a bunch of times. I like PB more than WD40 for things like that.  And if it's been raining where you are, or the truck has been washed, that's even more likely to make the door switch sticky.

One more thought,  my clicker on the key fob that unlocks the doors, when it unlocks, it turns on the interior light and cargo light on the back facing the bed. Wonder if yours does too? If so, it might be a messed up fob. Try locking the doors with the clicker, see if it changes anything.

If it is not a quick thing, my vote is it's going to be the door switch.  

Cole Tyler wrote:In those trucks there is a little wheel by the headlight switch that can sometimes mistakingly be turned all the up, which keeps the interior lights on,...

There is a very good chance that is the problem.  I've seen it more times than I can count.  The knob that dims and brightens the dash lights turns on the done light if turned all the way.