2010 T660 no washer and only high wiper speed

[Truckdriven]

(03-19-2023 )Jim The Trucker Wrote:  Hey there,
Problem: High speed wipers only and no washer

I have been around so many forums including reading here and cannot seem to find a specific fix for my problem. I have replaced the turn stalk and light control module. I have also changed the wiper motor.
I used another thread here and checked to CECU location for extra fuses and found none. The fuse panel CECU fuses were checked and ok along with the other 3 fuses that operate the washer and wiper functions.
I am at a loss here and the only controller not checked is the cab controller supposedly drivers side under the cab. I have not ran any tests on CECU as that is above my pay grade, just checked fuses.

Any ideas? I sure wish it was a simple fix but so far it has been a headache. Thanks for any help

Did you replace both wiper relays? Had Issues on my truck and it was simply a relay, There's two on them and the one relay only gets used for high setting so the other relay might be bad, It's one cheap and easy thing to rule out.