OEM GM Alternators

Can a Car Run Without an Alternator?

Yes, but it’s not going to be practical and will run out of charge. Its main function is to charge the car's battery and supply power to the electrical components while the engine is operating. The alternator is a crucial part of the vehicle's electrical system. Here are some possible outcomes if you operate a car without an alternator:

1. Battery Drain

   The car’s electrical system will rely solely on the battery for power. While the battery can provide power for a brief period, it will eventually drain out, especially if you use lights, radios, AC, and other electrical devices. When the battery is drained, the car will stall and not start again.

2. Limited Driving Distance

   With a fully charged battery, you may be able to drive for a short distance, but the distance will be limited. You will not have power for the lights, power steering, and brakes that rely on electrical assistance.

3. No Charging

   The battery will not recharge while driving if the alternator is not there. This will eventually lead to a dead battery, leaving you stranded.

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