old pump stopped working so i put in a new one. now when i turn the key there is no power going to the pump. all fuses in car and under hood are fine. what the hell can it be. need to get my baby back on the road, the jeep sux to drive........

 

I think the pump runs off a relay. Check out a wiring diagram to make sure. Also, make sure the wires are on the right terminals on the pump.

If you cannot figure it out, do what I did, run a relay with an on/off switch.

 

Fuel pump only runs if the key is HELD to START or the engine is actually running.

 

yea, you can check and make sure it works with the check connector in the engine bay, towards the airbox. Just bridge the two terminals and it should come on. you'll hear the fuel flowing thru the rails if the pump turns on

 

The fuel pump does not run with just the key to ON (no ground on the circuit opening relay to pull it in)

The fuel pump does run with the key held to start (coil in the circuit opening relay gets 12vdc to pull in the relay)

The fuel pump runs if the engine is running (afm fuel switch *makes* and supplys a gnd to the circuit opening relay coil, to pull the relay in.

The fuel pump pulls in if the key is to ON and the fuel pump check connector is jumpered (that act puts a gnd on the circuit opening relays coil which in turn pulls the relay in). The jumper wire simulates the afm internal fuel switch. Same wire circuit to the circuit opening relay's coil.