Common Causes of Failure

WARNING: This page is about a different car, the 2006 Suzuki XL-7. However, it is still accessible from the selected car via links, so may be relevant.

A battery is not designed to last indefinitely; however, with proper care, it will provide many years of service. If the battery performs satisfactorily during test but fails to operate properly for no apparent reason, the following are some factors that may point to the cause of trouble:

Accessories left on overnight or for an extended period without the generator operating.
Slow average driving speeds for short periods.
Electrical load exceeding generator output particularly with addition of aftermarket equipment.
Defects in charging system such as high resistance, slipping drive belt, loose generator output terminal, faulty generator or voltage regulator. Refer to GENERATOR SYMPTOM DIAGNOSIS .
Battery abuse, including failure to keep battery cable terminals clean and tight or loose battery hold down.
Mechanical problems in electrical system such as shorted or pinched wires.