Engine Stays on Fast Idle

Fig. 2 Glow plug wiring schematic (Part 1 of 2). 1982-83 models:

Fig. 2 Glow plug wiring schematic (Part 2 of 2). 1982-83 models:

1. With ignition switch in Run position and engine not running, disconnect electrical connector from engine temperature switch, Fig. 2.
2. Connect jumper wire between terminals on engine temperature switch and note if fast idle solenoid extends.
3. If solenoid extends, proceed to step 4. If solenoid does not extend, check throttle linkage or solenoid plunger for binding. If linkage is satisfactory, replace solenoid.
4. Check continuity of engine temperature switch with suitable self-powered test lamp.
5. Lamp should light below 120° F and shut off above 120° F. If not satisfactory, replace switch.