Cadillac CTS First Generation Forum - 2003 - 2007 Discussion, Radio not working in Cadillac CTS Coupe, Sport Sedan and Sport Wagon Forums; i replaced the antenna module in my wife's 2003 cts with a used one i purchased off of ebay and ...
i replaced the antenna module in my wife's 2003 cts with a used one i purchased off of ebay and now the am and fm are not working. The keyless entry has stopped working as well. The Fm radio did not work before the swap but the am radio did and the keyless did and now nothing is working. What could this be? a fuse? should i reinstall the old one to get the keyless entry back to working? Its not a fun process taking the car apart to fix this.
yes those links are behind GM's service firewall (i'm surprised that the images come through actually)
i can get you the rest of the install/removal documents form those links if you want (PM me your email address so i can send them as PDFs)
the only other suggestion that i would have is to put your old module back in and make sure it operates as it used to operate before you put this other module in
if it doesn't then you will know something else is going on
also, when you installed the module did you disconnect the battery?
i know it doesn't say to do so in the instructions above but usually when working on electronics in a car it's a good idea to have the battery disconnected