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Gauge Is Inaccurate

  1. Disconnect fuel tank sending unit connector. Connect Red lead of Instrument Panel Tester (J-33431) to sending unit harness connector terminal (Purple wire), and connect other Red lead to ground. Turn ignition on.
  2. Set tester dial to zero ohms, then 90 ohms. If fuel gauge indicates EMPTY at zero ohms and FULL at 90 ohms, check sending unit ground. If ground is okay, replace sending unit. If fuel gauge does not indicate as specified, check Purple wire between sending unit and cluster. If wire is okay, fuel gauge.
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