I have an 01 civic and just recently swapped out the rear speakers for some new ones. The switch went fine, didn't run into any major problems. Unfortunately, now whenever I am listening to the radio and turn the heater on, all of my speakers begin to static, but whenever I am listening to a cd and turn the heater on, no static and music is heard just fine. Up until the switch I've never had this problem. Did I snag some unsuspecting wire during the switch? Thanks for any help that comes through.

 

Check your radio ant. system, integrated into rear window.
You may have unplugged something. 94