Alternator Test
- Ensure battery is fully charged before beginning test. Turn ignition on, and check charge indicator light on instrument panel. If light comes on, go to step 3).NOTE: Terminals "S", "L", "B", and "E" are marked on alternator's rear cover. Terminal "F" is an internal terminal.
- If light is off, disconnect "S" and "L" terminals. Ground wire of terminal "L". If light remains off, replace indicator bulb and recheck. If light comes on with Mitsubishi alternator, go to BENCH TESTING . If light comes on with Hitachi alternator, reconnect "S" and "L" terminals. Ground internal terminal "F" using a stiff 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), check drive belt. If drive belt is okay or light remains the same after adjusting belt, repair alternator. If light goes off, system is okay. If light goes out after initial engine start up, operate engine at 1500 RPM and turn on headlights.
- If indicator light comes on, repair alternator. If indicator light remains off, run engine at 1500 RPM and measure voltage at terminal "B". If voltage is more than 15.5 volts, replace IC regulator. If voltage is 13-15 volts, alternator and regulator are okay.