Instrument Panel, Gauges and Warning Indicators: Testing and Inspection

- Engine Coolant Temperature
- Engine Oil Pressure
- Fuel
- Voltmeter

Test for battery voltage:
1. Remove gauge and turn ignition switch to the ON position. Refer to Gauge Removal and Installation.

Engine Coolant Temperature Gauge:

2. Using voltage meter, test voltage between Pin 3 and Pin 4.
3. If battery voltage is OK, replace meter. If not, check ignition wiring.

Test From Sensor To Gauge
Engine Coolant Temperature Gauge:
1. Ignition switch in the ON position, engine not running, disconnect temperature sensor and the engine coolant temperature gauge should read cold.
2. Ignition switch in the ON position, engine not running, ground Pin 1 and the engine coolant temperature gauge should read maximum temperature. If OK, test engine temperature sensor. If not OK, repair as necessary

Engine Oil Pressure Gauge:

Engine Oil Pressure Gauge:
1. Ignition switch in the ON position and the engine not running, the engine oil pressure gauge should read zero.
2. Ignition switch in the ON position, the engine not running, disconnect the oil pressure sensor and engine oil pressure gauge should read maximum oil pressure. If OK, test oil pressure sensor. If not OK, repair as necessary.

Fuel Gauge:

Fuel Gauge:
1. Remove gauge.
2. Using ohmmeter, measure continuity at Pin 1 of the fuel gauge wire harness connector, with the ignition switch in the ON position and the engine not running.
3. Check ohms.
- Fuel tank full is 4 Ohms.
- Fuel tank empty is 107 Ohms.
4. Using reading, estimate if gauge and reading are near each other. If fuel is added the ohms will decease. If the reading shows that a improper signal is being sent from the fuel sensor it will need to be tested.

Voltmeter:

Voltmeter:
1. Using voltmeter, connect one lead to ground and other lead to Pin 3 of the gauge wire harness connector. Check generator output.
2. Ignition switch in the ON position, and the engine not running, battery voltage should be present.
3. Ignition switch in the ON position and with the engine running, the generator output voltage should be more than battery voltage. If OK, test voltmeter. If not OK, check generator, if OK, repair circuit as necessary