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Temperature Gauge & Sending Unit

  1. Turn ignition off. If gauge does not indicate below COLD, replace temperature gauge. If gauge indicates below COLD, turn ignition on. If fuel gauge operates correctly, go to step 3).
  2. If fuel gauge does not operate correctly, check fuse. If fuse is okay, check for 12 volts on temperature gauge terminal on back of instrument cluster. If 12 volts are not present, repair wiring to instrument cluster. If 12 volts are present, replace temperature gauge.
  3. If fuel gauge operates correctly as in step 1), disconnect temperature gauge sending unit connector. Connect a 42-ohm resistor between temperature gauge sending unit connector (Yellow/Green wire) and ground. If temperature gauge indicates 187°F (86°C), replace sending unit.
  4. If temperature gauge does not indicate 187°F (86°C), measure voltage at sending unit connector (Yellow/Green wire). If 7 volts are present, replace temperature gauge.
  5. If 7 volts are not present, measure voltage at Yellow/Green wire terminal of 12-pin connector on back of instrument cluster. If 7 volts are not present, replace temperature gauge. If 7 volts are present, repair wiring between instrument cluster and sending unit.
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