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Could be the fuel selector switch on the dash is bad.
Use a test light to verify power is getting to the switch on Pin 5. If that is good use the test light to verify power is leaving on Pin 4 or Pin 6. Be aware power is there for only 1-2 seconds when cycling the key from Off to Run. To keep the fuel pump relay energized with the key in the Run position jumper Pins 2 & 6 on the data link/diagnostic port.
Thanks for the info but I have already done this and the switch is fine
How did you determine that?
Is there power coming into the switch? Then out of it as I previously stated?
If there is power into, then out of the switch the only other common tie points are connector C205 and ground G100. If the path to G100, located on the driver side of the radiator support, is open then the fuel level gauge would not operate.
C205 is located on the left hand rear side of the firewall.
I checked the power in and out with my SST test light. There is power into and out of the switch.
The fuel gauges don't seem to be working. They show as full on both tanks and I know for a fact they haven't been full in years. I will take your advice and check those 2 points and get back to you.
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