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Temperature Gauge

NOTE: When performing this test, DO NOT  connect sender wire directly to ground.
  1. Unplug coolant temperature sending unit wire at sending unit. Connect a 24 ohm resistor between wire and ground. Gauge should indicate 240°F (115°C). In a similar manner, connect a 104 ohm resistor. Gauge should indicate 158°F (70°C).
  2. If gauge tests okay, remove sending unit and place in hot water. The sender should be placed so that its sensing part is .12" (3 mm) from the surface of the water. Resistance should be 104 ohms at 158°F (70°C).
  3. Check coolant temperature gauge continuity. Coolant temperature gauge resistance should be 55 ohms.
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