Chart 20: Switch Pop or Accessory Noise

Chart 20 Switch Pop Or Accessory Noise:

IMPORTANT: For noise related to the activation or operation of a switch or accessory. For example, a pop when the brakes are applied or a hum when the A/C is used. Frequently an aftermarket cellular telephone, with an antenna inside the vehicle, may cause popping. Make sure the customer has not removed the telephone before the vehicle was left for service, refer to "Popping Noise".