1. Remove the electrical connector for the fuel shut-off solenoid from the injection pump.
2. Move the ignition switch to the RUN position.
3. Momentarily connect and disconnect the fuel shut-off solenoid connector and listen:
• If a clicking sound is heard, the solenoid action is correct.
• If a clicking sound is not heard, do the following things:
A. Measure the voltage at the fuel shut-off solenoid connector:
– If voltage measured is battery voltage, go to step B.
– If voltage measured is zero, repair the circuit from the ignition switch to the solenoid and re-check the
solenoid operation.
B. Check the condition of the fuel shut-off solenoid ground terminal and strap at the injection pump
governor cover:
– If the ground connection is good, go to step C.
– If the ground connection is poor, repair it and re-check solenoid operation.
C. Remove the injection pump governor cover and do the following things:
– Connect a jumper wire from the fuel shut-off solenoid to the vehicle battery negative terminal.
– Momentarily connect and disconnect a jumper wire from the fuel shut-off solenoid to the vehicle
battery positive terminal.
– Observe the solenoid action:
• If it operates, check the governor linkage inside the injection pump for binding.
• If it does not operate, replace it, install the governor cover and re-check the solenoid operation (refer
to Figure 7-51 on page 7-54).
4. Move the ignition switch to the OFF position.
5. Install the electrical connector for the fuel shut-off solenoid from the injection pump.
