The alternator is basically an alternating current (AC) generator with solid state rectifiers which convert AC current to DC current (direct current) for charging the battery.
Be sure to read and follow the "Alternator Service Precautions" before servicing the vehicle charging system.
ALTERNATOR SERVICE PRECAUTIONS
Because alternator (AC) systems differ from generator (DC) systems, special care must be taken when servicing the charging system.
- Battery polarity should be checked before any connections, such as jumper cables or battery charger leads, are made. Reversed battery connections will damage the rectifiers. It is recommended that the battery cables be disconnected before connecting a battery charger.
- The battery must never be disconnected while the alternator is running.
- Always disconnect the battery ground lead before replacing the alternator.
- Do not attempt to polarize an alternator, or the regulator of an alternator equipped car.
- Do not short across or ground any alternator terminals.
- Always disconnect the battery ground lead before removing the alternator output cable.
- If electric arc welding has to be done on the car, first disconnect the battery and alternator cables. Never start the car with the welding unit attached.
REMOVAL & INSTALLATION
- Disconnect both battery cables at the battery terminals.
- Disconnect the alternator output (BAT) and field (FLD) leads, and disconnect the ground wire.
- Remove the alternator mounting bracket bolts and remove the alternator.
- Installation is the reverse of the above. Adjust the alternator drive belt tension. Details are given in .