Battery light is on

Asked by Oct 05, 2014 at 08:24 PM about the 2004 Ford Excursion Eddie Bauer 4WD

Question type: Maintenance & Repair

2 Answers

105,385

Usually means that your alternator has failed.

2 of 2 people found this helpful.
915

Check your battery connections, tight and free from corrosion, and check all battery cables. Sears used to offer free battery/charging system checks. The battery is not getting charged for some reason, and it's voltage has dropped below normal limits. Usually this is what the light means. tennisshoes is correct as well. Since the alternator charges the battery once the engine has started, if it is not charging for some reason, then the light can come on. The voltage regulator could also be at fault, which is usually in the alternator or a separate unit.

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