Control Data Module (CDM) Failure - ZR-1 Net Registry Forums

Dynomite · 02-14-2015

Had sound on all four speakers quit all of a sudden on my 91'. It has been said that if you do not have 12v to the speakers (orange wire with black ground) the problem is the CDM. Well......as luck would have it, I had 12v at the speakers. Also had a little hush sound on the speakers.

So....replaced the Bose with one I knew was working from a 90' and still no sound. so now what......Oh geez......the CDM had to be removed as I had a spare from a 90' to try out. Well.....this is the second CDM I had to remove/replace. One CDM I found earlier not installed correctly above the Hush Panel (just sitting on the hush panel). Trust me.....I know why some guys just sit the CDM back riding on top of the hush panel

As it turns out the spare CDM worked perfectly and have to say......replacing the CDM is NO FUN but I accomplished it without breaking the plastic tabs holding the CDM in place

CDM Removal TIPS

See CDM Removal (CDM Installation NOT covered).

As an aside....I thought at first I was going faster than the speed of sound when I lost all Bose sound.....LT5s will do that to you

CDM Repair will cost between $125 and $180.
Used working CDMs can be found on Ebay for $100.

See Bose Speaker Amps and CDM Replace

02-14-2015	#1
Dynomite Join Date: Aug 2009 Location: South Dakota/California Posts: 3,816	Control Data Module (CDM) Failure Had sound on all four speakers quit all of a sudden on my 91'. It has been said that if you do not have 12v to the speakers (orange wire with black ground) the problem is the CDM. Well......as luck would have it, I had 12v at the speakers. Also had a little hush sound on the speakers. So....replaced the Bose with one I knew was working from a 90' and still no sound. so now what......Oh geez......the CDM had to be removed as I had a spare from a 90' to try out. Well.....this is the second CDM I had to remove/replace. One CDM I found earlier not installed correctly above the Hush Panel (just sitting on the hush panel). Trust me.....I know why some guys just sit the CDM back riding on top of the hush panel As it turns out the spare CDM worked perfectly and have to say......replacing the CDM is NO FUN but I accomplished it without breaking the plastic tabs holding the CDM in place CDM Removal TIPS See CDM Removal (CDM Installation NOT covered). As an aside....I thought at first I was going faster than the speed of sound when I lost all Bose sound.....LT5s will do that to you CDM Repair will cost between $125 and $180. Used working CDMs can be found on Ebay for $100. See Bose Speaker Amps and CDM Replace __________________ Clickable links On Iphone Touchable Links -Solutions- LT5 Modifications/Rebuild Tricks Low Mileage ZR-1 Restoration 1990 Corvette (L98) Modifications LT5 Eliminated Systems LT5 Added Systems LT5/ZR-1 Fluids 1995 LT5 SPECIFIC TOP END REBUILD TRICKS Last edited by Dynomite; 02-15-2015 at 02:04 PM.