I recently purchased an '01 Cabrio. FM reception is very good. However as a commuter I often listen to AM for traffic info. The AM has a constant "tick tick tick tick" sound. It does not vary based upon the engine speed so I don't think it's ignition related. If the reception is very strong on a station it will fade away. But if the station is weak just about all you hear is the electric tick tick sound. Any ideas?
TIA, Jay