1995 Ford Ranger My truck is haunted.

Electrical problem
1995 Ford Ranger 4 cyl Two Wheel Drive Manual 108k miles

After my truck reached 75k miles the following problems began and I have no idea what's causing it:
1) I would be normally driving and for no reason, the wipers would suddendly some on (on high) and the wiper fluid would spray until tank was empty. I would have to pull over, turn the truck off and restart to be able get it to return to normal operation.
2) I would be normally driving and for no reason, my dome-light would come on and the door-chime with the key-in-igition alarm would continuously sound. Nothing would stop this including:
- Stopping the engine.
- Removing the key from ignition.
- Opening and shutting the doors.

It would do this until the battery would be completely drained. It stranded me several times. My only solution would be to pop-the-hood and pull the neg-battery cable.

I have asked two mechanics and neither had any idea what was causing this. They guessed it was some computer or electrical problem.

Please help, I am ata aloss!
Wage