Engine Coolant Temperature Gauge

Disconnect temperature gauge sending unit harness connector. Turn ignition on and observe gauge needle. Gauge needle should move to COOL position. Connect sending unit harness connector terminal to ground through a 3.4-watt test bulb and observe bulb and gauge needle. Test bulb should illuminate and gauge needle should move to HOT position. If gauge functions as specified, replace sending unit and retest. If gauge does not function as specified, go to next step.
Remove instrument cluster. See INSTRUMENT CLUSTER under REMOVAL & INSTALLATION. Remove 3 screws from back of instrument cluster. See Fig 1. Measure resistance between specified terminals on back of instrument cluster. See ENGINE COOLANT TEMPERATURE GAUGE RESISTANCE table. Replace gauge if resistance is not as specified.

ENGINE COOLANT TEMPERATURE GAUGE RESISTANCE

Terminals ⁽¹⁾

Approximate Ohms

"A"-"B"

176

"A"-"C"

"B"-"C"

230

⁽¹⁾	See Fig 1.

Fig 1: Testing Engine Coolant Temperature Gauge