No-Load Test
- Attach tachometer to engine. Start engine and operate at 1500 RPM with no electrical load (foot off brake and doors closed).
- Record voltmeter reading when needle stops moving. Voltmeter reading should increase 1-2 volts more than battery voltage.
- If voltage increases properly, proceed to LOAD TEST. If voltage increases more than 2.5 volts, proceed to OVERVOLTAGE TEST. If there is no voltage increase, proceed to UNDERVOLTAGE TEST.