Rear Window Antenna Module: Operation
The AM and FM signals are received via isolated unheated lines along the top of the rear window.
NOTE:
If aftermarket window shading is added, it cannot be of the metallic type. Metallic type window shading can cause poor radio reception.
NOTE:
If an accessory cellular phone glass mount antenna is installed, it should only be installed so as to avoid contact with any of the rear glass grid lines.