Preparing for the test
1. Turn the ignition key to the "OFF" position.
Note: To accurately determine the fault at the connections, make sure that both terminals or their connections are not disturbed when performing the test.
2. Connect a digital voltmeter to the B terminal of the generator and the (+) terminal of the battery. Connect the (+) lead of the voltmeter to the B terminal of the generator and the (–) lead of the voltmeter to the (+) terminal of the battery.
Conditions for conducting the inspection
Read the voltmeter readings with the engine idling and the generator load on (headlights, heater fan, etc.).
Analysis of results
Normally, the voltmeter should show a nominal voltage of 0.3 V.
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If the voltage drop is greater than 0.3 V, the cause is most likely a wiring defect.
Fig. 7.10. Generator wiring test diagram
Check the wiring from the generator terminal "B" through the fuse link to the (+) terminal of the battery (Fig. 7.10).
Check the condition of the wire insulation (no signs of overheating) and the contact in the connectors. Eliminate the defects, then repeat the check.
After completing the check, turn off all consumers (headlights, heater fan, etc.), then turn off the ignition.