Currently I have my fuel pump (aeromotive) wired outside the pcm on a ground switch, but I'm starting to take all my external accessory and run them threw the pcm. The relay I have for the fuel pump in the back by the pump (and battery)

I tried to hook up c220 - J ('95) - "Fuel Pump Relay Control"

but it just primes, then shuts off.

See (Shbox) - http://shbox.com/1/harness_connector_faces.htm

The other "fuel pump" related wires I'm finding are

C210 - B - "Ground Feed to Fuel Pump Relay"
C210 - D - "Feed from fuel pump, and fuel pump relay to prime connector"

According to this image
http://shbox.com/1/fuel_pump_relay.jpg

You can see there is a Relay with those 3 wires and "pink" which I'm guessing is power to the pump. Ideally I don't want to run a High amperage wire back from the relay under my dash to the fuel pump.

So what are my options to get a "key" activated ground via the pcm so I can have my fuel pump work threw the pcm, or am I going to just have to double relay it?

(About the install it's Lt1 / 95 harness '69 Camaro retrofit)

How does this setup up work? Will the Fuel Pump relay control wire not sustain power unless the other wires are hooked up?

 

I think I may have figured it out, won't know until tomorrow, but I was just testing things with a test light and didn't hook up (or fire the car). I read a post that says that it will "prime first" then look for a opti signal, then turn the pump back on? I also read that some people have trouble with aeromotive pumps not holding pressure making it troublesome to hook it up via the pcm?

 

Yes, it primes for 2 seconds or so then shuts off when the key is turned to ON. When the computer sees the opti signals when cranking, it will come back on. If you have that relay control wire from the computer controlling your relay in the back, then you are all set.