FAQ Frequenly Asked Technical Questions. This section is read only, and posts are made by the staff. If you have something to contribute contact any moderator.

03 CTS bose radio problems

Old 11-27-2011, 10:21 PM
Junior Member
Thread Starter
Join Date: Nov 2011
Posts: 1
Default 03 CTS bose radio problems

I recently purchased an 03 CTS with about 80k+ mi. It has the standard bose radio that doesn't come in well in FM. AM & the CD player sound great. The FM has a hard time coming in, it sounds ok parked but could be better, especially the volume, it's a bit low. While driving it sounds like a far off broadcast. AM & CD, still ok. I took the radio out, antenna wire was fine. I bought a conversion antenna wire & tried using a regular whip type antenna & it seems to work a bit better, although I did not take it for a ride. There seems to be an antenna in the rear window above the defroster wires, which I believe is for the radio. There are 2 connectors leading to it from under the roof panel, I believe they go to a modulator for the radio. There is also another antenna about 6" long on a swivel glued to the outside passenger side rear window, an inside receiver is glued opposite from the outside one with an antenna wire leading off from it. Is this for the onstar? I also unhooked the 3 antenna wires just mentioned & the FM came in the same while parked or driving. Hmm? Oh, I've read issues with the rear defroster interfering with the antenna & there seems to be no problems between them. I guess, after all this blah blah, what it is I want to ask is, could it be the modulator?
Old 07-21-2012, 01:54 AM
Junior Member
Join Date: Sep 2010
Posts: 5

I have similar issue. FM radio do not work if the outside temperature is high. like more then 75 degrees. AM and other things work fine.
When temperature drops FM radio starts working fine. I have 03 CTS base modle.
Related Topics
Thread Starter
Last Post
Aftermarket Cadillac Modifications
01-12-2017 10:57 PM
The Allante Pub
12-16-2016 01:09 PM
Cadillac Seville
01-09-2010 05:45 PM
Cadillac Eldorado
10-25-2007 08:18 PM
General Tech
10-22-2007 08:44 AM

Thread Tools
Search this Thread
Quick Reply: 03 CTS bose radio problems

Featured Sponsors
Vendor Directory

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.