2004 jeep grand cherokee tank is full fuel gauge not working

Check to see if the fuse to the fuel pump is good. If the pump cannot be heard, then replace the cap and lift the hood. Have the helper turn on the key for 3 seconds and off for 5 seconds and on again a couple of times. The computer shuts the power off to the pump if it does not see a signal from the crankshaft sensor. The pump runs for only 2 seconds at a time when the engine is not running. Starting from the basics, take off the fuel cap and listen closely for the fuel pump to come on as a helper turns on the ignition key. Please let me know if you need anything else to get the problem fixed.If you feel that the fuel pump has failed, then this is the proper way of diagnosing the problem before replacing an item that may not be needed. There's two clips at the front of the cushion. You can get to the pump by removing an access cover under the rear seat cushion. That allows it to draw up air instead of gas. If that is right, suspect a dry-rotted rubber hose on the pump assembly. I have an idea your engine stalls once the gas tank becomes half empty. Mechanics also have the ability to run all the gauges all the way up and all the way down with their scanners to test if they are functioning properly.

That should make the gauge go down when you turn the ignition switch back on. If your gauges stay right where they were when you turn the ignition switch off, you will have to unplug the connector at the pump assembly. If your gauges normally go all the way down when you turn the ignition switch off, and that happens with the fuel gauge, you know that is okay and the problem has to be in the tank. Sounds like the float for the fuel gauge is hanging up inside the tank. If you start a new post every time, everyone will have a chance to reply but no one will know what we are talking about when they come in the middle of our conversation. Please click on the 'Leave a Reply' button on the bottom so you come back to this same page. So while it is stuck trying to go below a half tank I can add gas and get the needle to go up. I was trying to point out is while I cannot get the gauge to go below the I can add gas and watch the needle go up to full. Here is a video that will show you how to replace it:

It sounds like the level sensor has gone out.

2004 jeep grand cherokee tank is full fuel gauge not working