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The digital odometer shows stars, not numbers and the fuel guage worked before last fill up and now shows full even when tank is 1/4 full. any help is truely appreciated we just bought this and would like to take the kids traveling. Ron
If your rig is built on a Ford chassis, this would indicate shorted connectors or wires at or near the gauge cluster. It's also possible that the voltage regulating module (not to be confused with the "Slosh module") has shorted or failed.
Ford uses a power speedometer/odometer module (PSOM) to keep track of the mileage, so even though you display isn't showing anything, you should still have a mileage value saved. Assuming a Ford chassis.
This is not a problem that can be diagnosed via the internet. The gauge cluster needs to come out and wiring needs to be examined and tested. Keep in mind that if you've had anything electronic installed recently (radio, GPS, fuel efficiency gauge, etc.) This should be where you start looking.