Temperature Gauge Test

Disconnect terminal from temperature sending unit on engine, then connect test lead of tester C-3826A to terminal and second test lead to ground. Place pointer of gauge tester on E position and turn ignition switch to the On position. The temperature gauge should show C plus or minus 1/8 inch.

Place pointer of tester on the 1/2 position, the gauge should advance to the operating range left of 1/2 position of the dial. Place pointer of the tester in the F position, gauge should advance to H position of the dial. If gauge responds to test correctly, but does not operate when terminal is attached to sending unit, replace gauge.