# Chevy Blazer lights flickering and high pitched whine

**URL:** <https://community.cartalk.com/t/chevy-blazer-lights-flickering-and-high-pitched-whine/21152>\
**Category:** Maintenance/Repairs\
**Tags:** batteries, lights, alternators, blazer\
**Created:** [October 24, 2008, 1:27pm UTC](https://community.cartalk.com/t/chevy-blazer-lights-flickering-and-high-pitched-whine/21152 "2008-10-24T13:27:10Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![udelstudents](https://avatars.discourse-cdn.com/v4/letter/u/f4b2a3/32.png) [@udelstudents](https://community.cartalk.com/u/udelstudents)\
**Post date:** [October 24, 2008, 1:27pm UTC](https://community.cartalk.com/t/chevy-blazer-lights-flickering-and-high-pitched-whine/21152/1 "2008-10-24T13:27:10Z")

</div>

Hey all, I have a 2000 Chevy Blazer coupe (not 4x4) that started some issues on my way to work this morning. About 10 minutes into the drive, the instrument panel lights started flickering and I could hear a whine coming from the car that increased/decreased in pitch relative to acceleration/deceleration. Also, my RIGHT blinker “blinks” erratically when used. I did some searches and read that it possibly might be the alternator, but that can’t be b/c last week I got an oil change and had them check out all the fluids, mechanics, and electronics of the car. Everything checked out okay.  
  
  
  
 Now a few weeks ago I had my car off for a about 3 days and when I got back the battery was dead when I tried to turn it on. After a jump she was good to go. This morning I checked and the battery reads at 14 volts (although it does wobble a bit with the light flickering).  
  
  
  
 Any help would be much appreciated.

---

<div class="post-metadata">

**Author:** ![mcparadise](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mcparadise/32/32_2.png) [@mcparadise](https://community.cartalk.com/u/mcparadise)\
**Post date:** [October 24, 2008, 2:01pm UTC](https://community.cartalk.com/t/chevy-blazer-lights-flickering-and-high-pitched-whine/21152/2 "2008-10-24T14:01:29Z")

</div>

The alternator is the first thing I’d check. Just because it was OK last week doesn’t mean it can’t fail today.

I suggest you have the battery and the charging system tested. Most parts stores will do the testing free.