1994 Lexus GS 300 BATTERY LIGHT AND ABS LIGHT

Tiny
CLARENCE MOYLER
  • MEMBER
  • 1994 LEXUS GS 300
  • 6 CYL
  • AWD
  • AUTOMATIC
  • 106,662 MILES
WHY DOES THIS BATTERY LIGHT, KEEP COMING ON AND OFF; I HAD THE BATTERY AND ATERNATOR CHECK; THEY ARE GOOD; CAN YOU HELP? And the abs light. 1994 lexus gs 300
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Wednesday, November 18th, 2009 AT 8:10 AM

3 Replies

Tiny
KHLOW2008
  • EXPERT
Hi clarence moyler,

Thank you for the donation.

Symptoms seems to indicate a failing alternator, the carbon brushes are running out or you have a bad voltage regulator.

This would result in the indicator lights showing intermittently.

Was the alternator and charging system tested when the indicator lights were showing?

The alternator could be providing charge but the voltage regulator is not reading it correctly thus the indicator light would come on.
The alternator
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Wednesday, November 18th, 2009 AT 11:30 AM
Tiny
CLARENCE MOYLER
  • MEMBER
KHLow, WHAT DO I DO, FROM HERE?
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Thursday, November 19th, 2009 AT 9:02 AM
Tiny
KHLOW2008
  • EXPERT
When the lights come on, test the voltage between the battery terminals and get the reading. If it is less than 13 volts, the charging system is not working correctly and the alternator or its carbon has to be replaced.

Test between the alternator main post and ground as well. Ensure that readings are similar for both tests, between battery terminals and between alternator and ground.

Alternatively you can remove the alternator to check the carbon brushes length.
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Thursday, November 19th, 2009 AT 10:42 AM

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