12-Volt Battery

The following information is for the 12-Volt battery only.

A battery is not designed to last forever. With proper care, however, the battery will provide years of good service. If the 12V battery tests good but still fails to perform well, the following are some of the more common causes:

• A vehicle accessory was left on overnight.
• The driving speeds have been slow with frequent stops with many electrical accessories in use, particularly headlights, wipers, heated rear window, cellular telephone, etc.
• The electrical load has exceeded the charging system output, particularly with the addition of aftermarket equipment.
• Existing conditions in the 12V charging system.
• The battery has not been properly maintained, including a loose battery hold down or missing battery insulator if used.
• There are mechanical conditions in the electrical system, such as a short or a pinched wire, attributing to power failure. Refer to General Electrical Diagnosis .