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Temperature Gauge Test

  1. Remove electrical connector from temperature sending unit located at front of cylinder head. Connect one lead of Rotunda Gauge System Tester (021-00055) to connector and other tester lead to ground. Set tester to 18 ohms, turn ignition switch on and observe temperature gauge. Gauge should read 250°F.
  2. Turn tester to 60 ohms. Gauge should read 175°F. Turn tester to 223 ohms. Gauge should read 100°F. If all readings are within twice needle width of correct reading, gauge is functioning properly. If readings are not as specified, replace gauge.
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