Generator Output
- Check generator wiring harness electrical connections at generator. Check drive belt tension. Ensure battery is fully charged.
- Connect voltmeter between ground and generator "B" (battery) terminal. See Fig 1 . Connect ammeter positive lead to generator "B" (battery) terminal. Connect ammeter negative lead to positive battery terminal on the battery.
- To check generator no-load output, ensure all accessories are off. Start engine and allow engine to idle. Increase engine speed to 2000 RPM and note output voltage and output amperage. Output voltage should be 14.4-15.0 volts at 68°F (20°C) and output amperage should be 10 amps maximum.NOTE: Output voltage may slightly vary depending on temperature of IC voltage regulator case.
- If output voltage and output amperage are within specification, go to next step. If output voltage exceeds specification, check ground on brushes. If ground on brushes is okay, replace IC voltage regulator. If output voltage is less than specified, repair or replace generator as necessary.
- To check generator high-load output, allow engine to idle. Increase engine speed to 2000 RPM. Turn on headlights and heater motor. Note output amperage. Output amperage should be at least 20 amps. If output amperage is less than specification, repair or replace generator.