I know this is an old thread...but I need to do the same thing. Can you tell me how you wired in the 2 wire pump?
I don't know if I did it "correctly" but I used the black to black on the pump, and then black with white stripe to red on my pump
It is currently, originally I had it tied in with the white/black wire. but then I was getting a no start/spark issue. Looking back that may be a different issue entirely as I am still having trouble getting it to run reliably. I'm going to start another thread for that issue though
I also purchased the electrical manual for this model year of minicab which showed up a little while ago. Let me dig into it some and figure our where in the truck each of these is supposed to go.