System Check
- Connect a voltmeter between glow plug positive terminal and ground. Set the parking brake and shift the transmission in Neutral. Turn the ignition switch to "ON" position and check the following:
- Voltmeter should indicate battery voltage as soon as the ignition switch is turned on and the glow plug indicator lamp should be lit. The glow plug indicator lamp should turn off 3 seconds after the ignition switch is turned on.
- The voltmeter should read 4.2-5.3 volts about 6 seconds after the ignition switch is turned on. Turn ignition off. Unplug fuel cut valve on injection pump. Turn ignition on.
- When glow plug indicator light goes out, turn ignition switch to "START". Voltmeter should indicate battery voltage for 1-2 seconds, and then 4.2-5.4 volts for 7-8 seconds. Turn ignition switch to "ON".
- Unplug coolant temperature switch connector. Voltmeter should read 0 volts. Connect coolant temperature switch connector. Unplug speed switch coupler and ground the connector. Voltmeter should read 0 volts.