# High Pitch Sound near alternator **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** chevrolet, noises, cavalier, alternators\ **Created:** [April 3, 2010, 9:21pm UTC](https://community.cartalk.com/t/high-pitch-sound-near-alternator/46944 "2010-04-03T21:21:06Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![scytheye](https://avatars.discourse-cdn.com/v4/letter/s/a4c791/32.png) [@scytheye](https://community.cartalk.com/u/scytheye)\ **Post date:** [April 3, 2010, 9:21pm UTC](https://community.cartalk.com/t/high-pitch-sound-near-alternator/46944/1 "2010-04-03T21:21:06Z")
I am hearing a high pitch whirring sound, and a metallic jingling sound from the belt near the alternator. When I idle the car and switch the interior fan to on, it stops. If I turn the fan knob to off, it starts back up. This just started but my battery had a jump recently and I’m not sure if that affects it. Any ideas would be greatly appreciated! ---
**Author:** ![waterboy](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/waterboy/32/764_2.png) [@waterboy](https://community.cartalk.com/u/waterboy)\ **Post date:** [April 3, 2010, 10:55pm UTC](https://community.cartalk.com/t/high-pitch-sound-near-alternator/46944/2 "2010-04-03T22:55:26Z")
Take a piece of heater hose to listen with and isolate the sound, could be as simple as a tensioner or belt replacement. Proper diagnosis for a proper repair. ---
**Author:** ![Caddyman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/caddyman/32/23_2.png) [@Caddyman](https://community.cartalk.com/u/Caddyman)\ **Post date:** [April 4, 2010, 3:21am UTC](https://community.cartalk.com/t/high-pitch-sound-near-alternator/46944/3 "2010-04-04T03:21:08Z")
Remove the serpentine belt and spin all the pulleys by hand. Any bad ones will feel loose or rough…