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Battery light on dash is on?

Tiny
STEVENJWILSON
  • MEMBER
  • 2005 TOYOTA HIGHLANDER
  • 2.4L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 172,000 MILES
Battery light on dash is on, but when I accelerate the light goes out. I tapped on the alternator during idle and the light went out. Voltage with light out is 13.8, with light on the battery volts is 12.5
Monday, December 23rd, 2024 AT 12:55 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,896 POSTS
Hi:

It sounds like the alternator is failing. It's odd that by tapping it, you make it work again. Check to make sure there are no connection issues at the alternator. Also, make sure the alternator mount is tight.

If the connectors are in good condition and free of damage and corrosion, then the alternator should likely be replaced. If you look below, I attached the directions from my manual for replacing it. Additionally, here is a link that may help you as well.

https://www.2carpros.com/articles/how-to-replace-an-alternator

Let me know if this helps or if you have other questions. Also, Merry Christmas!!!

Take care,

Joe

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Monday, December 23rd, 2024 AT 8:48 PM

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