Need help on Bose system problem
Thread Starter
Pro
Joined: Sep 2004
Posts: 745
Likes: 0
From: Friendswood Texas
Need help on Bose system problem
We all know that these Bose systems can suck. I have lost sound on the right door speaker system. Changed out amplifier and speakers on right side and still no go. All other speakers ( left and both rear ) and radio are working fine. Is this an amplifier relay problem ? Any help would be appreciated. 
Melting Slicks
Joined: Aug 1999
Posts: 2,240
Likes: 42
From: Baltimore, MD USA
The Bose Amp. Relay supplies 12 volts to all of the speakers used by the amplifier. Since 3 speakers work, the Bose relay is working. You could still have a wiring problem.
With the radio on, at the connector going to the amp. box, with a volt meter you should measure 12 volts DC from the Pink/Black wire to the Black wire. That would confirm you're getting the proper voltage from the Bose Amp. Relay. If a Bose amp. has no audio signal input, you should still hear a faint hiss coming from the speaker.
If you have a scope you could look at the audio signal coming from the CDM/Receiver to the speaker amplifier box. For the Right side front speaker the audio input signal wire is Light Green.
The CDM/Receiver box is located under the Passenger side dash I think for (90-92). I know the CDM for 93's is located in the passenger side rear storage bin.
You drop the black plastic cover above the passenger side footwell. There about 5 harness plugs you need to disconnect. Once the plugs are disconnected, you'll see a black plastic tray which the CDM is mounted to.
You then disconnect 5 connector plugs at the CDM and also the antenna plug.
It's not an easy job.
A used CDM goes for $50 and up. To have yours repaired will run around $250.00.
With the radio on, at the connector going to the amp. box, with a volt meter you should measure 12 volts DC from the Pink/Black wire to the Black wire. That would confirm you're getting the proper voltage from the Bose Amp. Relay. If a Bose amp. has no audio signal input, you should still hear a faint hiss coming from the speaker.
If you have a scope you could look at the audio signal coming from the CDM/Receiver to the speaker amplifier box. For the Right side front speaker the audio input signal wire is Light Green.
The CDM/Receiver box is located under the Passenger side dash I think for (90-92). I know the CDM for 93's is located in the passenger side rear storage bin.
You drop the black plastic cover above the passenger side footwell. There about 5 harness plugs you need to disconnect. Once the plugs are disconnected, you'll see a black plastic tray which the CDM is mounted to.
You then disconnect 5 connector plugs at the CDM and also the antenna plug.
It's not an easy job.
A used CDM goes for $50 and up. To have yours repaired will run around $250.00.
Melting Slicks
Joined: Aug 1999
Posts: 2,240
Likes: 42
From: Baltimore, MD USA
Here's a website with pictures and trouble shooting procedures.
http://www.carstereohelp.com/corvette.htm
http://www.carstereohelp.com/corvette.htm
Pro
Joined: Jul 2003
Posts: 542
Likes: 0
From: MA
Instructor
Joined: Feb 2005
Posts: 185
Likes: 3
From: Vancouver Wasington
Need help on Bose system problem
This may also help with trouble-shooting your system
http://www.zr1netregistry.com/Bose2.pdf
Tomcat 74
http://www.zr1netregistry.com/Bose2.pdf
Tomcat 74
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
5 Best & 5 Worst Corvette Daily Drivers
Joe Kucinski
The Headlights of Every Corvette Generation Explained
Joe Kucinski
5 Best & 5 Most Overrated Corvette Track Packages of All Time!
Joe Kucinski
Every 2027 Corvette Engine Explained
Joe Kucinski
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
Verdad Gallardo
10 Ugly Corvettes That We Still Kinda Love
Joe Kucinski
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
