AM Band Radio - Interference When Wipers are Operating: Overview
File In Section: 9 - AccessoriesBulletin No.: 83-96-01
Date: February, 1998
Subject:
AM Band Radio Interference when Windshield Wipers are Operating or Secondary Ignition System Noise with Engine Running (Install Three Additional Ground Circuits)
Models:
1997-98 Chevrolet Venture
1997-98 Oldsmobile Silhouette
1997-98 Pontiac Trans Spoil
Condition
Some owners may comment that there is radio interference (static or buzzing sound) on the "AM" Band when the windshield wiper arms are moving. In addition, some owners may comment that there is a buzzing type sound coming from the radio when the engine is running. They may state that this sound increases and decreases with engine speed (RPM). There is no interference on the "FM" band.
Correction
Additional ground circuits are required between the windshield wiper system and the vehicle body, the engine compartment hood and the front end sheet metal, and the radiator support and the engine.