Sorry to bump the post back up, but I'm dealing with similar issues, and can't find the answer by searching.
So it looks like the manifold fitting gets routed to a fuel pump vac port, and the wiper motor gets powered from the fuel pump.
My issue is that I have two hoses coming from my wiper motor, and from the looks of
Tim's picture, some just have one hose to hook up.
I hooked one hose to the mani port, and the other to the fuel pump, and that didn't work. The wiper arms go one way, then won't return.
Should I run the hose from the fuel pump to both hoses from the motor?
Thanks,
-tyler