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Temperature Gauge Circuit Test

  1. Ensure METER fuse is okay. Turn ignition off. Unplug 14-pin connector from interior fuse panel. Remove instrument cluster. See INSTRUMENT CLUSTER under REMOVAL & INSTALLATION. Measure resistance between Black/Yellow wire at 14-pin harness connector and ground. If resistance is not less than 5 ohms, reconnect fuse panel wiring and go to next step. If resistance is less than 5 ohms, repair Black/Yellow wire between fuse panel and harness connector.
  2. Turn ignition on. Measure voltage between Black/Yellow wire at 14-pin harness connector and ground. If voltage is at least 10 volts, go to next step. If voltage is not at least 10 volts, repair Black/Yellow wire between fuse panel and harness connector.
  3. Turn ignition off. Measure resistance between instrument cluster pin 1F and "+" screw on temperature gauge. If resistance is less than 5 ohms, go to next step. If resistance is not less than 5 ohms, replace instrument cluster printed circuit board.
  4. Measure resistance between Black wire at 14-pin harness connector and ground. If resistance is less than 5 ohms, go to next step. If resistance is not less than 5 ohms, repair Black wire to ground.
  5. Disconnect wire at temperature sending unit. Connect Gauge Tester (021-00055) between harness connector and ground. Connect wiring to instrument cluster. Turn ignition on. Gauge pointer should sweep smoothly between "H" and "C" as tester is adjusted between 14 and 230 ohms. If gauge operation is not as specified, go to next step. If gauge operation is as specified, replace temperature sender.
  6. Turn ignition off. Unplug 14-pin connector from instrument cluster. Measure resistance of Black/Blue wire between 14-pin harness connector and temperature sender connector. If resistance is less than 5 ohms, go to next step. If resistance is not less than 5 ohms, repair open Black/Blue wire.
  7. Measure resistance of Black/Blue wire between 14-pin harness connector and ground. If resistance is greater than 10,000 ohms, go to next step. If resistance is not greater than 10,000 ohms, repair short in Black/Blue wire.
  8. Measure resistance between instrument cluster pin 1E and terminal "T" on temperature gauge. If resistance is less than 5 ohms, replace temperature gauge. If resistance is not less than 5 ohms, replace instrument cluster printed circuit board.
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