Anything that generates an electrical field can introduce unwanted static into your car’s audio system. The alternator, the windshield wiper motor, and the components in a sound system generate varying levels and types of noise and static. So while it’s possible to isolate and repair the source of almost any type of static in your car’s audio, it often takes real work to find and fix it.
BUZZ, FAMILY, FACE? How to FIX Car Audio Noise!
The first step in locating the source of noise or static in your car stereo is to determine whether the problem is with the radio, accessories such as a built-in CD player, or external accessories such as your iPhone. To do this, turn on the head unit so that you can hear the interfering noise.
If the noise is only present when the engine is running and the pitch changes with the engine RPM, then the problem is probably with the alternator. This type of car speaker whine can usually be solved by installing a noise filter. If the noise is present regardless of whether the engine is running, take note of any audio sources that are related to the noise and proceed.
If you hear noise only when listening to the radio and not when listening to CDs or other audio sources, the problem is with the antenna, tuner, or an external source of interference. To determine the source of interference, remove the head unit, locate the antenna wire, and perform other related actions.
