Q:

Why would an alternator overcharge?

A:

The reasons alternators overcharge include issues with the battery, drive belt, alternator output, external regulator and type of alternator, explains AA1Car.com. Issues with these specific components result in the alternator overcharging the vehicle’s battery and electrical system. When this occurs, the alternator does not operate properly and malfunctions as the source of self-generating electricity.

A malfunctioning external regulator does not disengage properly, which causes the alternator to overcharge, AA1Car.com explains. This is the part of the alternator that regulates the amount of electricity the vehicle needs to perform at varying speeds. Alternator output is another reason for overcharging. Re-manufactured and replacement alternators are larger in size and offer a higher output than stock alternators. This causes inefficiency in the pulley on the belt drive, which causes the alternator to rotate more. The additional rotations increase the charging supply.

AA1Car.com adds that alternators have different designs that can incorporate computer sensors. Computer-controlled alternators use sensors to distribute voltage. The sensor regulates the amount of electricity the alternator produces. A defective sensor causes the alternator to overcharge by sending an inaccurate signal.

Alternators can also overcharge due to incorrect replacement batteries. This generally occurs in newer model vehicles when the alternator requires a signal from the electronic control system and the replacement battery does not send the correct signal.


Is this answer helpful?

Similar Questions

  • Q:

    How does an car alternator work?

    A:

    A car alternator is an aluminum piece of equipment attached to a car engine's crankshaft by a drive belt. When the crankshaft begins turning after the engine is ignited, it rotates the drive belt, which forces the alternator to rotate in response. The movement of the alternator generates magnetic power that is transferred to the car's battery to power lights, windows, locks, air conditioning, the dashboard and the radio.

    Full Answer >
  • Q:

    How do you recharge a dead car battery with a bad alternator?

    A:

    There are two ways to recharge a battery with a bad alternator: jump starting it with another car or using a portable battery charger. Although it is possible to recharge a battery without the alternator, the battery will probably not be powerful enough to make it far without the alternator to cycle the charge.

    Full Answer >
  • Q:

    What battery last the longest?

    A:

    According to Consumer Reports, AAs are the most widely sold non-rechargeable type of battery, and the Energizer Ultimate lithium lasts the longest. It took a total of 1,286 digital photos before running out of power.

    Full Answer >
  • Q:

    What is an alternator belt ?

    A:

    An alternator drive belt is a malleable rubber belt that helps the alternator operate in a motor vehicle. A belt-driven alternator can operate at two to three times crankshaft speed.

    Full Answer >

Explore