Diesel Data: Automotive Repair

DR-4C Throttle Control Solenoid Circuit


1. Connect a voltmeter between gray wire of dual solenoid 3-way connector and ground.
2. Turn ignition switch Off, then disconnect 14-way computer electrical connector.
3. Turn ignition switch to Run position.
4. If voltmeter reads within 1 volt of battery, replace computer.
5. If voltmeter reads between zero and 1 volt, repair short to ground in gray throttle control wire.