Alternator Discharge Light

Auto Systems and Repair

The purpose of the Alternator Discharge Light or "Charging System Light" is to provide a Charging System self-test and to alert the driver if there is a problem in the Charging System on their vehicle.  When the vehicle is first started, the Charging System Light should illuminate and then go out within 1-2 seconds.  If the Light behaves in any other way, the Charging System should be inspected.

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