fuel pump problems?

[crosby]

I have an 87 V20 pickup, just got finished sticking an engine in it from an 87 Jimmy, and it won't start. When I switch tanks, you can a whining sound, like a solenoid or something. Could that be something that switches tanks only? Looking into the throttle body, I don't see any gas at all on the intake floor. There is some dirt or rust in there, which I should probably vacuum out somehow... Any idea what harness should be connecting to power the fule pumps, and where it is supposed to connect? Thanks for your help!

[piecesparts]

The whining noise is the switching motor under the cab shifting tank alignment. It is normal and you should listen for that noise when you change tanks. At this point I don't have my tech manual for the wiring diagrams.

[crosby]

Thank you sir, at least that confirms what I have been thinking. I am guessing I may have missed the harness that powers the fuel pumps when I swapped the engine in. I have a connector that is now wrapped around the brake booster that looks like a spade connector with two terminals side by side, going nowhere. I normally am not that good at wiring, and this truck is so moused that it's unbelievable!! I really should get the factory service manual, shouldn't I? Thanks very much for any help you guys can provide. I am so close to getting this thing running, I can feel it! Soon I will be plowing, and bringing wood home for our third floor, and doing burnouts in front of the neighbors' houses. It's gonna be GREAT!!!