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 to 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 voltage does not increase to proper level, proceed to UNDERVOLTAGE TEST.