Bose radio failure
Thread Starter
Intermediate
Joined: Sep 2006
Posts: 41
Likes: 1
From: London
Bose radio failure
My Bose radio died todayin my 1996 conv.. I replaced the amp unit about a month ago from vette to vette. Worked great until today. Everthing on the head unit went dark. Both fuses (4 and 40) were OK. I'm getting power into my amp unit but not getting the 14volts out (from the amp) to the head unit.
Any ideas on what I might check????
Bob
Any ideas on what I might check????
Bob
Last edited by vanderb; Nov 17, 2006 at 05:47 PM.
Team Owner
Joined: Aug 2000
Posts: 40,156
Likes: 45
From: San Pedro CA
explain "amp." What "amp" did you replace?
If you replaced the receiver module, make sure everything is hooked up to it and nothing came loose.
Read the FAQ, and that will give you an understanding of the system topography.
If you replaced the receiver module, make sure everything is hooked up to it and nothing came loose.
Read the FAQ, and that will give you an understanding of the system topography.
Safety Car
Joined: Apr 2003
Posts: 3,793
Likes: 9
From: VA
Originally Posted by vanderb
My Bose radio died todayin my 1996 conv.. I replaced the amp unit about a month ago from vette to vette. Worked great until today. Everthing on the head unit went dark. Both fuses (4 and 40) were OK. I'm getting power into my amp unit but not getting the 14volts out (from the amp) to the head unit.
Any ideas on what I might check????
Bob
Any ideas on what I might check????
Bob
If different, then sounds like you need to talk to v2v about the CDM they sold you.
This is assuming that nothing came loose, like Bogus said.
Thread Starter
Intermediate
Joined: Sep 2006
Posts: 41
Likes: 1
From: London
Originally Posted by Vis Croceus
Sounds like you are talking about the CDM not the amps. Did the same thing happen with your first CDM or was it a different problem?
If different, then sounds like you need to talk to v2v about the CDM they sold you.
This is assuming that nothing came loose, like Bogus said.
If different, then sounds like you need to talk to v2v about the CDM they sold you.
This is assuming that nothing came loose, like Bogus said.
The head unit has a battery in connection as well as 14 volts from the CDM.
Does the 14 volts from the CDM ( which is 0 V now) power the head unit?
Last edited by vanderb; Nov 18, 2006 at 01:20 PM.
Team Owner
Joined: Aug 2000
Posts: 40,156
Likes: 45
From: San Pedro CA
so there is no power coming out of the CDM? I would think it's time to inspect all the connections at the harness, and be sure there isn't a bad wire somewhere.
otherwise, the repaired CDM fried. I don't think there is an internal fuse or anything, so I would send it back for another check...
otherwise, the repaired CDM fried. I don't think there is an internal fuse or anything, so I would send it back for another check...
Safety Car
Joined: Apr 2003
Posts: 3,793
Likes: 9
From: VA
Originally Posted by vanderb
Does the 14 volts from the CDM ( which is 0 V now) power the head unit?
Possibly the original CDM shorted and damaged the head unit, and when you plugged the new CDM in, the damaged HU damaged the new CDM.
I assume you've verified power and ground into the CDM?
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
Thread Starter
Intermediate
Joined: Sep 2006
Posts: 41
Likes: 1
From: London
Yes. Power and ground to the CDM unit are OK.
The used CDM unit I put in 3 weeks ago worked great.. I got into the car the other day and turned the stereo on with a CD in and it was playing fine. I was changing tracks when I hit the COMP button on the head unit and heard a CLICK and everything went dead. So now I'm trying to figure out if it's the head unit or the CDM. The only suspicious thiing is I'm not getting 14 volts (getting 0 volts) out of the CDM unit that goes to the head unit.
Any ideas????
The used CDM unit I put in 3 weeks ago worked great.. I got into the car the other day and turned the stereo on with a CD in and it was playing fine. I was changing tracks when I hit the COMP button on the head unit and heard a CLICK and everything went dead. So now I'm trying to figure out if it's the head unit or the CDM. The only suspicious thiing is I'm not getting 14 volts (getting 0 volts) out of the CDM unit that goes to the head unit.
Any ideas????
Safety Car
Joined: Apr 2003
Posts: 3,793
Likes: 9
From: VA
Pretty sure there is no external relay controlling the head unit.
Check and see if the +12 and gnd from the CDM to the HU are good.
I'm guessing here that the +12 is always provided by the CDM and the +14 is provided when the HU switch is turned on. I'll check that on my car later and post what I find.
If my theory is true, then if you find +12/gnd out of the CDM to be bad, then it's probably the CDM, but if they are good, it could be either the CDM or the HU.
Check and see if the +12 and gnd from the CDM to the HU are good.
I'm guessing here that the +12 is always provided by the CDM and the +14 is provided when the HU switch is turned on. I'll check that on my car later and post what I find.
If my theory is true, then if you find +12/gnd out of the CDM to be bad, then it's probably the CDM, but if they are good, it could be either the CDM or the HU.
Safety Car
Joined: Apr 2003
Posts: 3,793
Likes: 9
From: VA
Just checked mine, and what I was guessing is correct - 12V is provided by CDM regardless of HU switch position, 14V only when HU is switched on.
BTW there is a fault diagnosis tree in the manual for checking these voltages. You might want to use it.
BTW there is a fault diagnosis tree in the manual for checking these voltages. You might want to use it.
