No-Load Test

1. Connect 88 Digital Multimeter to monitor engine speed.
2. Connect the leads of 73 Digital Multimeter across the battery terminals.
3. Read the voltage (base voltage).
4. Start the engine.
5. Run the engine at 1500 RPM with no electrical load.
6. Read the voltage. The voltage should be in the range of 14.1 to 15.1 volts. If the voltage increase is less than 2.5 volts over the base voltage, perform the Load Test. Load Test
If there is no voltage increase or if the voltage increase is greater than 2.5 volts, perform the Generator On-Vehicle Tests. Generator On-Vehicle Tests