Gas Gauge Not Working?

My son's 1996 Jeep Grand Cherokee / 4.0L Inline 6-cyl (180K miles) has a fuel delivery issue. There is no fuel pressure on the fuel rail while cranking (Schrader valve depressed to check). Also, the fuel gauge is not working. I know the gauge isn't working because I added 5-6 gals of gas hoping he'd run it dry. But no registration or movement of the gas needle at all. The truck was running fine and one morning last week would crank, but not start.

So, I disconnected the wiring harness at the gas tank and check for continuity through to the pump/sending unit. I found continuity across two of the four terminals. On the supply side of the harness I found no power with the ignition key turned to the run position. I don’t see any damage to the wiring from tank to fuse box.

I know that due to the miles on the truck I should suspect the pump unit, but I’m really not sure its getting any power. Could it be something simple I’ve overlooked? Fuses seem good, but I don’t know about the little black relays thingies in the fuse box †do they ever go bad? I’m looking to get out of this cheaply as I just sank $1500 into a new front suspension thanks to my boys accidental, rainy night, ditch run.

Hey my fuel gauge doesnt work where do I begin to fix this and is it easy?

Hi. I have an '88 Jeep Cherokee that has about 253,000 miles on it. The engine is rebuit but transmission is original. It is the 4cyl engine-standard. It sat for a few months in the woods & cranked up fine with a new battery & no probs for a month or so but now has a prob. It started sputtering about a week ago & noticed the fuel gauge was not working correctly. It stalls out on me sometimes & now if I get below 1/4 a tank of gas it dies. We've changed the fuel filter & also the plugs. I don't know if it has a fuel sensor since it's so old so can anyone help? We're thinking about taking the fuel tank out & cleaning it out really good but anything else we should/can do? Thank you anybody that can help! :X

Thanks for the info but he said he's replaced the fuel pump several times already but always uses used pumps out of junkyards. Anything else it might be? Thanks again.

I know in a perfect world we'd all have all the money we wanted & our cars would never break down but I live in reality so sometimes we do what we have to do to get by. Thanks.

Thanks for the advise.