Check all fuses with a test light. If all good, you will need to diagnose each circuit. Look for the temperature sensor, disconnect connector, ground test light and touch wire. Check to see if the gauge move. If it does, you will need a new sensor. Basically the test is the same for fuel gauge. Disconnect connector at the fuel tank and touch contact and see if gauge move. If it does, the sending more than likely is at fault. Make sure you test each wire as there will be a few. Use proper jack stands anytime you work under a car! Let me know your progress.
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