I had the same issue. It was the fuel lines connecting to the gas tank. I had snapped my bolts off the rear driveshaft and the jeep sat for about 2 weeks until i fixed it. Got back in and while driving the line burst and started leaking fuel. not fun.
I just replaced the fuel lines, hooked everything back up and now my pump does not work. Any ideas on where to start? with key on I have power at the rear pump plug but it was only reading around 7 volts.