Ill show you how to fix your Crown Victoria, Grand Marquis and Lincoln Towncar radio reception issue, especially interference caused by your rear window defroster, for under $10.00. Here is the cheap antenna I used in this video (Amazon Paid Link), which will work excellent for most applications. If you are extremely far from the broadcast sites, you may want to use a more expensive antenna, but for most this will work better than the factory, rear glass antenna.
This problem also occurred on the Lincoln MKZ and MKS, Ford Taurus and Mercury Sable from 2008-2010. Ford TSB 09-19-2.
Aaron's Customs LLC 