Antenna
Rear Glass Tint -Metallic tints will negatively affect both AM and FM reception performance of the glass antenna. These tints can be identified by their reflective characteristics. Radio signals are also reflected by the metallic tint preventing the glass antenna from receiving the signals.
Nonmetallic tints will not affect reception performance if they are installed correctly. However, if the installer inadvertently cuts the glass antenna or rear defogger line imprints during tint installation, radio reception performance will be reduced and/or static noise will result.
Butyl Sealer -
The rear glass window is held in place by a butyl sealer. This compound is conductive enough that it can negatively affect reception conditions if it touches the glass antenna or the rear defogger imprints. If any part of the butyl sealer is touching the imprints, carefully cut the excess butyl sealer off the rear glass. Be careful not to damage the imprint as an open circuit in either the glass antenna or the rear defogger imprints can result in poor reception conditions.
Electronic signal received by the antenna reaches the radio through the core wire of the coaxial cable. Any noise mixed into this wire will cause noise in the radio. In order to prevent this noise from mixing into the radio, the core wire inside the coaxial cable is covered with a mesh wire called a shield wire. This shield insulates against noise by transmitting noise to ground (through the case of the radio). If this shield wire has a poor ground, noise may result.