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Gauge Inaccurate

  1. Unplug temperature gauge sending unit connector. Connect one lead of gauge tester to sending unit connector wire. Connect other wire to ground. Turn ignition on. Set tester resistance to 1400 ohms. Observe gauge. Set tester resistance to 55 ohms.
  2. Temperature gauge should indicate approximately 100°F, then approximately 260°F. If gauge responds correctly, replace temperature sending unit. If gauge does not respond as described, check for open circuit in Dark Green wire between sending unit and gauge. If circuit is okay, replace temperature gauge.
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