This is weird, my wiper + windshield washer are going on when ever I put the car at access or when the car is started without stoping. My arm is for sure ok. I don’t know where to look for this. For the moment, I have removed the fuse for the wipers.
Sounds like the switch itself to me, but you’ll need to get out a volt meter and start testing to be sure …
thing is that I played on my engine and had to remove my valve cover so… I had to play with the wires at the back to remove it, there is something related to that cause it was working fine 10 minutes before.
Solved, it was a ground, a wire was stuck under the valve cover.