2002 Liberty No elec to fuel pump

[waltermanm]

I bought a 02 liberty 3.7 with a blown engine. Just put new engine in cranks and fires but nothing from fuel pump.. I supplied direct to pump and pump works. Relays seem to be working I swapped with others. So what else could be interrupting the circuit. ? What are all the points to check? Could I have unknowingly unplugged something from underneath? Is there a protection circuit that would have tripped when the old engine self destructed?

Thanks

 

[J33Pfan]

im not much help here, but you have to check the fuses & power to the fuses/fuse box & relay. something might have got pinched.

any stored codes?

 

[GunnerSchenck]

How do you know there's nothing from the fuel pump? Or that there's no electric to it? Did you unplug the connector to the fuel pump and check voltage at it with the key turned to ON??
Start with checking fuses and see if anything blew.
But if so, don't just replace it and think it's the end.. if it's a fuse, something caused it to blow, such as a shorted wire..
Have you checked fuel pressure at the fuel rail?
Can you hear the fuel pump humm when you turn the key to on?? Might want to be outside the car with your ear underneath it and have someone else turn it to on, but mine has always been loud enough to hear the pump prime from inside the Jeep.
If you can hear the pump prime turn the Jeep to on, then off 3 times without starting it, then try starting it.. this will help to build up fuel pressure from the pump and it should fire up if fuel is being fed..

 

[waltermanm]

@gunnerSchenck... I have unplugged the fuel pump module. Tested the plug and not elec to the plug at the fuel pump. with the key in the run position and had someone cycle the key to prompt the relay to kick in. Pump does run once I wire 12v to it directly from a battery. Where are all the connectors for the wiring harnest going from the relay box under the hood?