after install before buttoning things back up i checked to see if it worked. It did with the exception of the left front speaker which just buzzed in proportion to the volume level. I'm thinking a bad cable (8211853 and RER radio)

Any thoughts??

 

just a heads up..

when I installed the kit in my Commander.. I had the same buzz... I realized I didnt have one of the connectors all the way together...problem solved.

hope this helps..

 

I tried it 4 times. Was your buzz in one speaker location??