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Intermittent charge light goes on

2000 Impala 3.8 it will intermittently show a red battery indicator light.


New battery, cables, alternator, and 3wire connector on the bottom of of alternator, still have the problem.


I did not have access to a wiring diagram that would show me where the 3 control wires lead to on the 3 wire connector



Suggestions welcome
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Originally Posted by halfprice5 View Post
2000 Impala 3.8 it will intermittently show a red battery indicator light.


New battery, cables, alternator, and 3wire connector on the bottom of of alternator, still have the problem.


I did not have access to a wiring diagram that would show me where the 3 control wires lead to on the 3 wire connector



Suggestions welcome
Did you do the work, or someone else?

I would follow the negative battery cable and ENSURE that the ground connection(s) are solid and tight, with no rust or corrosion.

Use caution - but also follow the positive battery cable to the starter connection and ensure that the connection is clean and tight. It will be live / hot with the battery connected. You may want to disconnect the battery if you find a loose connection, before you proceed further.
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May also check 7th gen. forum.
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post #4 of (permalink) Old 06-28-2019 Thread Starter
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Work was combination of shop and myself. I'm a retired instrument/computer tech/mechanic. Normally I do my own work but this time I took it to a shop. They could not find anything, but did replace the alternator, battery I replaced due to failure due to age..


First thing I did was clean major - & + from the battery on. Next was the control wires on the bottom of the alternator, It didn't look healthy so I crimped a new connector, with adhesive lined heat shrink and re wrapped the harness.


I need a schematic of where the red/whtstrip, orange, and green wires go I want to do a continuity check end to end.


I have the GM shop manuals but I can not find what I need.
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