1991 Grand Am LE 4 door Battery Light Flickering

Tiny
KIBAWOLFSRAIN
  • MEMBER
  • 1991 PONTIAC GRAND AM
I got a 2.5 L Engine in it, its a 91 Grand Am LE and it's got 160K on it, I just replaced the alternator and now the battery light is flickering when I drive it, I was told that it might be the battery, it has been charged since I replaced it. If anybody can help, thanks
Sunday, September 2nd, 2007 AT 1:31 AM

3 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Slap a voltmeter on it before you start it, read the voltage and record it -Now fire it up while engine is idling record the voltage then comeback and give it to me.

You could check the belt tension and all connections from the battery and behind the Alty.
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Sunday, September 2nd, 2007 AT 3:45 AM
Tiny
KIBAWOLFSRAIN
  • MEMBER
  • 2 POSTS
Ok, I Put a voltmeter on it, when off it said 12.72

When Idling it said 14.82

Also I checked the tension, and all were good and tight
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Sunday, September 2nd, 2007 AT 11:55 AM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Below will help you in troubleshooting pay close attention to terminal L at the alty-check for an intermittent grounded wire on L.


https://www.2carpros.com/forum/automotive_pictures/12900_grand_am_le_alty_wiring_diagram_2.jpg



Hope this helps you.
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Sunday, September 2nd, 2007 AT 3:15 PM

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