THE BRAKE LIGHT AND BATTERY LIGHT ON THE DASH ...

  • Tiny
  • Anonymous
  • 2008 Kia Spectra
  • 160,000 miles

The brake light and battery light on the dash flickers on and off. The battery has been replaced and the connections have been cleaned, the alternator has been checked to verify that it is charging.

Sunday, March 17th, 2013 AT 12:56 AM

1 Answer

  • Tiny
  • caradiodoc
  • Expert
  • 24,907 posts

Need specific numbers to evaluate the charging system. Start by measuring the battery voltage with the engine running. It must be between 13.75 and 14.75 volts. If it is, or if it's even a little high, have the charging system professionally load-tested. If all the generator can produce is exactly one third of its rated output current and "ripple" is very high, it has a defective diode.

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Sunday, March 17th, 2013 AT 1:04 AM

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