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Temperature Gauge (Short Test)

  1. Disconnect the coolant temperature sender/switch connector and turn ignition switch to "RUN" position. If gauge reads cold, replace coolant temperature sender/switch.
  2. If gauge does not read cold, check instrument cluster printed circuit connector No. 1 terminal No. 6 for an open and Dark Green/White wires for short to ground. See Fig 1 . Replace coolant temperature gauge if wires are good.
Fig 1: Instrument Panel Voltage & Resistance Chart (Connector 1)
G8158Courtesy of GENERAL MOTORS.