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Battery Light On after ignition key swap?

Tiny
COSTERA
  • MEMBER
  • 2004 CHEVROLET SILVERADO
  • 6.6L
  • V8
  • 2WD
  • AUTOMATIC
  • 175,000 MILES
After a theft attempt, I was forced to change the key cylinder and housing. Everything is back to normal, but the battery light stays on after the key is removed. This of course killed both batteries (Diesel-LLY). Both batteries have since been replaced and indicate fully charged. Before I go throwing parts at it, is there a strategy to probing a few wires (housing/alternator/etc.)?
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Monday, December 23rd, 2024 AT 5:24 AM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,389 POSTS
Yep, lets find out what is wrong which might be the alternator got popped during the event. With the engine running lets check the voltage at the batteries, here is a guide to help us see if the alternator is charging or not.

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

If not lets check the fuses in the under hood fuse panel: IGN E and SEO EGN let me know what happens.
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Monday, December 23rd, 2024 AT 1:18 PM

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