Here is an interesting one for you. 2003 Caravan with 218k km on the clock. In the middle of the night, Wife & I noticed a strange thump thump thump noise coming from out on the street where we park. Came outside this morning and windshield wipers are barely moving, battery is dead and I can't shut them off. That explains the strange thumping noise. I disconnected the battery and charged up the battery. Later, I hooked the battery up, started the van and all is OK ... everything works as it should. About 10pm, wife hollers "there's that thumping noise again." I go outside and the wipers are on. I unlock the doors, fire up the engine and can't turn the wipers off. Only thing I could do was pop the hood and unplug the connector. What would cause the wiper motor to run with the switch off and no key in the ignition without popping a fuse?

 

Probably the infamous Power Distribution Center failure. But kinda hard to say for sure.


What happen if you pull the fuse or the relay for the Wiper?

 

Could it be a relay inside the power distribution centre sticking? I was thinking it must be temperature related because the wipers start up in the evenings after the sun goes down.

 

check out my thread above yours. I had this happen twice. My wiprers are now wired straight.