DR-2B Oxygen Solenoid Control Circuit

1. Turn ignition switch Off, then disconnect 14-way computer electrical connector.
2. Connect a voltmeter between terminal No. 12 of the connector and ground, then turn ignition switch to the Run position.
3. If voltmeter reads within 1 volt of battery voltage, replace computer. Before replacing computer, ensure pins in terminal No. 12 are contacting correctly.
4. If voltmeter indicates no voltage, locate and repair open in wire between oxygen solenoid and terminal No. 12.