'99 door/light issue?

[Fordgirl89]

So this is what my truck has been doing periodically - mostly when it gets wet such as when it rains or after I wash it but the past couple weeks it has been doing it when it hasnt been wet:
My truck beeps when the key is in the ignition like the door is open but shuts off after I turn the truck on. Also the interior light comes on everytime I come to a stop then turns off when I get going again. I've seen this problem in one other truck so far - an early '99 F450
Anyone have this problem or know what the problem is and how to fix it?
When I had the door panel off last weekend I discovered some water has been getting inside the door from the door handle not fitting tightly enough - could this have anything to do with this?

[Fordgirl89]

Nobody?
Well looks like I'll be tearing into my door to figure it out on my own

[SuperCrutyPS]

I've never heard of that before - Sorry I didn't see your OP.

Do you have power door locks? It might have something to do with the locking actuator. If it has water in it, it could be sending weird signals out causing the other symptoms.

I wished I knew more.

[strokinpower]

I just doused mine in WD40 and it never acted up again. Squirt it in the door where that black rod is.

[huntercox]

mine stays on all the time. Where is the switch to change located at?

[BIGBILL105 45]

Mine is starting to do it so I just pulled the bulb out of my dome light lol. It is on the ext doors by the handle.

[e99f2506sp]

Mine does the same thing when it gets really humid for the first time of the year and from time to time when it rains. Its obviously the switch sticking, wherever it is. Its annoying driving down the road, but also annoying cause my aftermarket alarm is based off those switches and it set the alarm off once when the switch screwed up when it was parked.

If you do pull it apart, let me know what you find out Thanks and good luck

[Zaairman]

Spray your door latches down with WD40.

[huntercox]

thanks big bill and great looking truck by the way looks good

[Fordgirl89]

Thanks guys! I will try the WD40
The water in the door is getting on the wires below the actual door handle and anything below it. I'm planning on shrink wrapping the wires to see if that helps at all