2005 Hummer H2
Hoping to narrow my problem down. After a couple days rain, I turned my key on and the Rear washing fluid spray just stayed on. I immediately thought it was the wiper motor pulse board which I replaced a couple months ago, even though I have a great deal of silicone sealing it. So I took it off dried it and put it back on. Still the rear washing fluid stayed spraying.

Then I noticed if I pushed the washing fluid tab on the steering wheel multifunction switch it would stop. Sometimes it will go for most of the day or hours, but at some point the rear washing fluid will start up again, and i just hit the tab again and it goes off.

I have followed various threads and procedures on here for sealing cab lights, door trims...etc, but moisture must have gotten in somehow.

Do you believe it's the multifunction switch, wiper motor pulse boad or some other issue like fuses? Thanks!

 

The switch is probably the cheapest to replace first. I have taken mine completely apart when I installed LED's everywhere and that sucker is definitely a little complicated with how it functions. I wouldn't be surprised if that was the culprit.

 

Thanks. Suprisingly, found one on Amazon for $80 or so...worth a shot. I'll keep the board posted.