Fuel pump questions

[Mazdryk]

I think my fuel pump is from a 2004 Z06 corvette.

1. There are 4 pins. What is the required input for each and what is each pin used for? I am guessing A and D are power and ground.
2. Will my car run with nothing plugged in to the 3 pin connector on top of the fuel tank (should be level / pressure sensor)?
3. Does the connector for these 2 items usually come from the main engine harness (the one with the Throttle, alternator etc)?

THANKS!!!

[mlkwd1]

Take a look at this link. I beleive it will answer your question.

http://ls1tech.com/forums/attachments/conversions-hybrids/309609d1312581787-2004-fuel-pump-wiring-question-fuelpump.jpg

[Mazdryk]

Pin A (ground) doesnt connect to the fuel pump. My car has this pin grounded to the engine block and then the other 3 pins going into the pump. Does this setup actually work? Seems backwards to me.

[mlkwd1]

Take a look at page 184. This is where you get ground spliced for the pump.

Starting at the plug that connects to the fuel tank harness separate the harness that connects the fuel
tank to the main engine harness.
The ground wire from this plug runs through a junction before continuing to the loop connector. Trim
the extra wire off of the junction leaving enough wire for a splice.
On the round connector, there is a thin grey wire at terminal “S”. Follow this wire back the same
length as the junction and splice it in from the tank side. The wire will now connect from the tank plug
to the chassis ground.