I just installed an aftermaket head unit into my wife's 06 V6 convertible and i have a problem. Every time the brake pedal is depressed / released you can hear a click coming through the speakers. It's not as noticeable if the volume is up. I use a metra wire harness for Crutchfield that matched up great. any suggestion to eliminate the click?

 

that would be a strange one........ Does it come through all the speakers, the front/rear, tweeters/woofers?