Gas gauge doesn't work - 1992 Jeep Wrangler

I had mine stop working over a year ago. If the tank is more than half full it will measure correctly but anytime it falls lower it stops working. Luckily anytime it is truely low the low gas warning does come on so it is a great help.

Check the Instrument Cluster Fuse... I am willing to bet that is the problem

It may be the sending unit in the tank that needs replacing. Here's how you can check: Turn the key on and disconnect the sender unit at the gas tank. Ground the sender unit's wire with a jumper wire from the truck's harness to ground. Watch the gauge. If the gauge on the dash is good, grounding the sender wire will cause the gauge needle to react and should move to full. This would indicate a new sending unit is required. If the gauge doesn't move when the sender unit is grounded, the gauge is bad and needs replacing. Pull the instrument cluster out to replace the gas gauge. Likely any old ford gas gauge might work-back then, there were not so many production changes.

Your fuel pump may not be working properly

The fuel gauge is not fused separately from the rest of the gauges in the instrument panel, so unless the whole lot is dead the problem lies elsewhere. It is likely if the gauge doesn't work it will be the gas gauge sending unit in the fuel tank that is defective.

Sound like a problem with the fuel sending unit; generally is attached at fuel pump.

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Talking about fuel gauge issues and how do you how do you diagnose, ... is the dash unit right here, and obviously the gauge doesn't read correctly. ... to fix the fuel gauge, so you can actually fix the fuel gauge electronically by reflashing the program. ... How to Troubleshoot a Malibu Fuel Gauge & Dash Light Not Working ...Could be a bad fuse - fuse # 17 is a 15 amp fuse for the fuel gaugeCould be a bad float on the fuel gauge sending unit inside the gas tank ( it's with your electric fuel pump ) If the float gets a pinhole or crack in it , the float fills with gas and sinks so the gas guage reads empty all the time Could be a wiring problem

three things could have gone wrong one the gas gauge could have shorted two the fuel sending unit has gone out of three there is a fuse blown or relay blown

There's a float inside the tank that the fuel gauge works off of. If you step on the brakes or accelerate hard it causes the gas inside the tank to slosh around and you can see the fuel gauge move when you do this. If you know the vehicle has gas in it, the best way to check if the gauge is bad is to drive around enough to where you should have burnt a noticeable amount of gas. If the gauge doesn't move, then there's something wrong with it.


Since the gauge moved when you braked hard, I would assume it's working properly because it picked up on the level change inside the tank where the float's at.

Chances are the horn is burnt out, the gas gauge will require a new fuel tank gas gauge sending unit and the odometer will require the speedomenter be removed and sent out for repair, the little gear drive for the odometer is broken