Glove Box

Under the hood

Engine

Under hood Drivers side

underhood

Fuse panel drivers side interior
I HAVE A 1995 JIMMY 4.3 Vortec 4X4. The fuel pump will not turn off even with Key Out. I have pulled every Relay I can find... Get conflicting information where the fuel relay located. I have attached pictures that show under the hood and Glove Box. Before I get into tracing wiring would like some advice or conformation I am pulling correct relay. Presently the only way I can shut it off is to pull the ECM1 Fuse. I find so many conflicting pictures on line. Thanks

 

Usually that is a stuck relay or a bad oil pressure sensor { as you may know }
My MORF was built out of a 92 s15 jimmy relay was mounted on the firewall above brake booster - Maybe behind the plastic cover above yours ???
EDIT - I see three relays in the photo of the riders side firewall by heater - did you check them ?
Edit again - I see your frustration - I did a quick search - early 95s were pose to be in a under hood fuse pannel or mounted to the firewall under hood - later in the year they were pose to be moved to inside the glove box - two relays its pose to be the left hand one - three relays its post to be the center one.
Pull a relay and see if pump shuts off - if so great if not replace and go to the next PIA but it will find it and beats tracing wires at the moment.
got to love engineers - I'll shut up now .......

 

Thank you, I thought I was crazy!! seeing a lot contradictions in Fuel pump relay locations......Bad thing I have all those relays: lol!! I do have a question about Oil pressure sending unit...will it keep fuel pump on? ? My Oil pressure gauge works? or does that matter?

 

yes your gauge may still work - a sending unit with a single wire usually just goes to the gauge - two or three wire units may have the fuel pump option - in the chance you lose oil pressure its there to shut down fuel killing the engine so no damage occurs due to a lack of oil - a shorted unit ends up doing the opposite .....

 

Thanks, I will let you know how it works out tomorrow

 

unplug the wires to the sending unit if pump shuts off its usually bad

 

I did a little more reading last night - This is a condensed version of what I found.
Chevy engineers being so bright did not install a separate fuse for the fuel pump. The power does run thu the ECM 1 fuse.
It powers the relay and pump wires on the sending unit separately and not in a series.
The relay powers up pump during start while engine is cranking until oil pressure is above 4lbs then the sending unit then kicks in for power.
The reason why you can't find the relay is because if either is shorted power is still constant until shorted unit is disconnected .....

 

I un-plugged the oil sending unit and no more zombie fuel pump!! The oil pressure gauge needle now all the way to the right maxed out? I thought it would show no Pressure???

 

that's normal it works with restiance - no restiance to gauge when unplugged - sending should be bad with the pump shutting down when unplugged - change it out I bet prob solved - let us know how it goes ....