If it's like my setup (2017 27BHS), it's actually not a 3 way valve. There are only two. Not sure why they set it up that way. But you're probably right, there are not three for the bypass. I don't know how they would setup a bypass with one valve. So make sure there isn't another one hiding in there somewhere.
In any case, I have to turn both valves to bypass and it works.
__________________
2017 Jayflight 27BHS
2013 Ford F-350 Crew Diesel (deleted)
|