Alternator Test
- Ensure battery is fully charged prior to beginning test. Turn ignition on and check charge indicator light on instrument panel. If light comes on, go to step 3). If light is off, disconnect alternator connector and ground "L" wire.
- If light remains off, replace indicator bulb and retest. If light comes on, reconnect alternator and ground "F" terminal by using a wire. See Fig 1. If light is off, repair alternator. If light is on, replace IC regulator.
- Start and run engine at idle. If light is dim, flickers or remains on (bright), repair alternator. If light goes off, run engine at 1500 RPM and turn on headlights. If charge indicator light goes off, go to step 5).
- If charge indicator light is dim, idle engine and measure voltage between terminals "B" (positive) and "L" (negative). If less than .5 volt, alternator is okay. If more than .5 volt, repair alternator.
- Run engine at 1500 RPM and measure terminal "B" voltage. If more than 15.5 volts, replace IC regulator. If 13-15 volts, idle engine and check indicator light. If off, system is okay. If on, repair alternator.