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Gauge Indicates "H" At All Times

  1. Unplug coolant temperature sender connector. If gauge indicates "C", replace sender. If gauge indicates "H", unplug 8-pin instrument panel cluster connector, located behind instrument cluster. Using a DVOM, check resistance between terminal No. 1 (Yellow/Black wire) and ground.
  2. If resistance is greater than .7 ohm, repair open in Yellow/Black wire between instrument panel cluster and coolant temperature sender. If resistance is less than .7 ohm, check instrument panel cluster printed circuit for cracks and poor connections. If printed circuit is okay, replace gauge.
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