DR-28B Radiator Fan Relay Circuit

This test must be performed with engine at normal operating temperature.
1. Connect a voltmeter to radiator fan relay terminal 2, and ground. Hold ATM button until Code 96 appears. Radiator fan may cycle in test mode.
2. If relay clicks, and voltmeter reading pulsates. Check connections in circuit.
3. If voltmeter reading is within 1 volt of battery voltage, and does not pulsate, proceed to Step C.
4. If voltmeter reading is zero to 1 volt. Disconnect computer 10-way connector. If reading is within 1 volt of battery voltage, replace computer.
5. If voltmeter reading is not within 1 volt of battery voltage, proceed to Step D.