This is kinda a strange one. I was looking at t light out on my front let, i turned on my paring lights and I could hear something under the hood, opened the hood and I find that the rear washer pump is running. confirmed with the fluid running down my back gate. Wiper is not on, just the pump running.
His happens when the parking lights are on, and of course headlights as well.

Any Thoughts on this one???

 

Sounds like a bad ground somewhere back there to me. Tail lights even working properly?

 

^^ This. The only common link with the lights on and the wiper switch off is the grounding point.

 

Yep. When things get weird, as in Twilight Zone weird, the first place to look is your grounds.

Check my sig, #1, for a link to a thread with nice pictures of all the ground locations.