Audio/Electronics Stereo System Installation Info, Amplifiers, Subwoofers, Radar Detectors, Police Scanners, and CB Radios for the Corvette
Sponsored by:
Sponsored by: Innova

No Speaker Volume? CDM Location?

Thread Tools
 
Search this Thread
 
Old Jul 2, 2008 | 03:21 PM
  #1  
RAW 1990 Corvette's Avatar
RAW 1990 Corvette
Thread Starter
2nd Gear
 
Joined: Jul 2008
Posts: 2
Likes: 0
Default No Speaker Volume? CDM Location?

Just purchased a 1990 Vette with no music. The Radio, CD, & Cassette all work so no problem.

All four speakers are out. No sound at all. I already took out the Head Unit, but where is this so called CDM on a 1990 vette.

I have have read about more fuses other than just the "Radio" fuse, but where are they?

I have read about an amp relay, where is it?

Where is this CDM?

Any help would be much appreciated.

Thanks Ray
Reply
Old Jul 2, 2008 | 10:20 PM
  #2  
RandyJ75's Avatar
RandyJ75
Safety Car
15 Year Member
 
Joined: Jan 2006
Posts: 3,566
Likes: 4
From: Mt Laurel NJ
St. Jude Donor '06-'07
Default

Originally Posted by RAW 1990 Corvette
Just purchased a 1990 Vette with no music. The Radio, CD, & Cassette all work so no problem.

All four speakers are out. No sound at all. I already took out the Head Unit, but where is this so called CDM on a 1990 vette.

I have have read about more fuses other than just the "Radio" fuse, but where are they?

I have read about an amp relay, where is it?

Where is this CDM?

Any help would be much appreciated.

Thanks Ray

Hello Ray, and welcome to the Forum.
The CDM is located in the dash, on the pass side of the car. To remove, you must first remove the hush panel down by your feet. Start by removing the door to the fuse holder, and then the three screws that hold on the beauty ring that includes the fuse door. Then run your hand on the hush panel were the carpet stops, and the plastic begins. There should be three more screws that hold that on. You should now be able to remove the hush panel. To see the CDM easliy, remove the air vent on that side, and look down inside the dash, you should see the CDM box. there are bolts on either side of it, and seveal plugs on both sides. remove them, and then push the CDM up and back. It will not come out w/o a fight.
Good luck.

Randy

BTW, read the C4 FAQ at the top of the section before you do any thing. Unless your car is a low milage garage queen, you may want to consider removing everything and replacing it w/ new, better equipment.
Thats what I did.
Reply
Old Jul 3, 2008 | 03:07 PM
  #3  
RAW 1990 Corvette's Avatar
RAW 1990 Corvette
Thread Starter
2nd Gear
 
Joined: Jul 2008
Posts: 2
Likes: 0
Default

Thanks very much Randy,

I am going to replace everything. New HU and Speakers.

Question: After I take out the amp can I use these wires that are attached to it to run the new speakers, and also the connections to the new Head Unit? or is it better to run new wires?

Ray
Reply
Old Jul 6, 2008 | 09:57 PM
  #4  
RandyJ75's Avatar
RandyJ75
Safety Car
15 Year Member
 
Joined: Jan 2006
Posts: 3,566
Likes: 4
From: Mt Laurel NJ
St. Jude Donor '06-'07
Default

Originally Posted by RAW 1990 Corvette
Thanks very much Randy,

I am going to replace everything. New HU and Speakers.

Question: After I take out the amp can I use these wires that are attached to it to run the new speakers, and also the connections to the new Head Unit? or is it better to run new wires?

Ray

Ray,
It is better to run new wires, not that hard, since you will have everything apart anyway. It is also a good idea to leave the stock wires alone, so that it would be easy to reinstall the stock radio if you want/need to down the line.
Some things to think about doing while you have it apart are sound deadeding the interior, replacing the rugs, Repainting the bezel and console, replacing the shift boot (do a search on Redline), basicly freashening up the whole interior. Easier to do it all in one shot. I'll be doing mine when I get back from vacation at the end of the month.

Randy
Reply

Get notified of new replies

To No Speaker Volume? CDM Location?





All times are GMT -4. The time now is 03:43 PM.

story-0
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE
story-1
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-2
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-3
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE
story-4
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

Slideshow: Ranking the top 10 Corvette engines by torque output.

By Joe Kucinski | 2026-05-05 11:58:09


VIEW MORE
story-5
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

Slideshow: A Corvette pace car nearly matching IndyCar speeds sounds exaggerated, until you look at the numbers.

By Verdad Gallardo | 2026-05-04 20:03:36


VIEW MORE
story-6
Top 10 Corvettes Coming to Mecum Indy 2026!

Among a rather large group of them.

By Brett Foote | 2026-05-04 13:56:44


VIEW MORE
story-7
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

Slideshow: the top 10 things Corvette owners want in the C9 Corvette

By Michael S. Palmer | 2026-04-30 12:41:15


VIEW MORE
story-8
10 Revolutionary 'Corvette Firsts' Most People Don't Know

Slideshow: 10 Important Corvette 'firsts' that every fan should know.

By Joe Kucinski | 2026-04-29 17:02:16


VIEW MORE
story-9
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

Slideshow: Should you buy a 2020-2026 Corvette or wait for 2027?

By Michael S. Palmer | 2026-04-22 10:08:58


VIEW MORE