Battery light remains on after replacing alternator and battery

Tiny
SWEETJESUS
  • MEMBER
  • 1998 OLDSMOBILE DELTA 88
  • 3.8L
  • V6
  • AUTOMATIC
  • 169,000 MILES
Replaced both battery and alternator and battery light still on. What could be wrong? Is it a fuse, pulley?
Thursday, November 5th, 2020 AT 8:27 PM

1 Reply

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good morning,

I attached a wiring diagram for you to view. Check the 2 fuses that I circled for power on both sides.

https://www.2carpros.com/articles/how-to-check-wiring

https://www.2carpros.com/articles/how-to-check-a-car-fuse

If they are good, we need to test for voltage to the alternator. You will need a voltmeter for the test. The ECM controls the alternator but before we go there, we need to do these checks.

https://www.2carpros.com/articles/how-to-check-a-car-alternator

Roy
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Friday, November 6th, 2020 AT 4:56 AM

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