mine is stuck on full as well, did you ever find out what the problem was? If I wiggle the wires on the pump it will go to empty and the light will come on..had a new pump installed and it has not worked since

 

before you go pulling the sending unit, inspect the ground wire on the front of the tank that signals the sending unit. mine was broken there and a quick fix made it good as new.

and if you have to pull the sending unit, don't forget to disconnect the battery, and use a brass drift punch to knock the lock ring loose. don't use a steel punch, if you create a spark, you may not be able to finish the job.

 

Theoretically, this is best mileage I've ever gotten. But seriously, I have a question concerning the price of the job of replacing fuel pump for a 97 Jeep Cherokee manual transmission.
This is the first Jeep I've ever owned and I love it dearly. But about a month ago while on a trip we hit a pot hole and since then the needle stays on full even with the engine off. I have been told that indicates a bad sending unit (not sure about right terminology). I have been quoted two prices one from a Jeep dealer service department of around $600 and another from a general auto repair shop that said they could do it for $300. I don't scoff a bargain, but 50% difference?
I also want to know if the sending unit failure will cause other problems if put on hold for a bit. I keep up with the mileage regularly, but I can't see changes if they occur during a failure. Do you gurus of the fabulous Jeep club have any advice?

 

97+ you have to drop the tank, or cut an access hole in the floor of the cargo area to gain access to the top of the tank.

earlier models have the fuel pump on the front of the tank.