Radio quit - ZR-1 Net Registry Forums

Subfixer · 09-20-2019

If its not one thing, its another. Radio quit working. Fuses good, amps getting 12 volts (so relay is good). Looks like the CDM audio out died.

For those who have removed this item from under the dashboard ('92), can I access this from the top by removing the glove box? I've been under the dash and can barely see the CDM from underneath.

-=Jeff=- · 09-20-2019

No I believe it needs to come out from below

TX '90 ZR1 · 09-20-2019

I did the one on my '90 a while back. Still have bad memories of the experience!!
You will need to access the left (driver's) side from the bottom. The right (passenger) side can be accessed from the right end of the dash after you remove the trim from around the fuse panel. It also comes out through this area.
Give Dr. Don a call. He will tell you the procedure without having to disconnect the mess of wires underneath it.
Good Luck !!!

billschroeder5842 · 09-22-2019

I did it on my 91 a couple of years ago. A total tedious PITA. Not hard, but just a fidget.

Hint, you need to go from the bottom and you will make it a lot easier for yourself if you remove the seat first. I did not (I'm not smart) and my back was messed up for about a week.

It is doable and it took me 4 hours

Young1 · 04-01-2020

I’m bringing this back up because my radio quit. All fuses checked. The antenna goes up, the radio turns on, the clock works, it selects stations, no sound. FSM says to test the receiver relay. Where is this relay? If relay is good then receiver is bad. Fun, fun to pull that too. Man did GM ever service this stuff? Two more inches on the radio head harness would have made it much easier to get the connectors apart.

Ccmano · 04-01-2020

Dr. Don’s is the place to go for receiver and amp repairs.
https://www.doctordons.com/

I’m only aware of the amplifier relay not a receiver relay. It’s to the left of the steering column near the turn signal flasher.
H

Corvette95 · 04-02-2020

I have the dash off the 90 I am restoring. Here are some pictures of the CDM, I THINK it would be the same on a 91. Maybe it will help you on a better way to access by feel. Hope it helps.

09-20-2019	#1
Subfixer Join Date: Sep 2018 Location: Groton, CT Posts: 361	Radio quit If its not one thing, its another. Radio quit working. Fuses good, amps getting 12 volts (so relay is good). Looks like the CDM audio out died. For those who have removed this item from under the dashboard ('92), can I access this from the top by removing the glove box? I've been under the dash and can barely see the CDM from underneath. __________________ 1992 ZR1 #442, 2 tops, White, White, Haibeck 415, 3.90 gear, Coilovers 2018 Audi RS5, 2.9 V6 Twin Turbo, Auto, Black, Black 2021 Audi Q3, 2.0T, 8 spd Tiptronic, Navarro Blue metallic, Pearl Beige

09-20-2019	#2
-=Jeff=- Join Date: Jul 2007 Location: Bartlett, IL Posts: 7,137	Re: Radio quit No I believe it needs to come out from below __________________ 1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - 3" Magnaflow Bullet cats - LT4 Catback Late Model IH - Plenum Coilovers - 4.10s Custom Interior NCM Lifetime Member #978

09-20-2019	#3
TX '90 ZR1 Join Date: Oct 2017 Location: TX Posts: 1,960	Re: Radio quit I did the one on my '90 a while back. Still have bad memories of the experience!! You will need to access the left (driver's) side from the bottom. The right (passenger) side can be accessed from the right end of the dash after you remove the trim from around the fuse panel. It also comes out through this area. Give Dr. Don a call. He will tell you the procedure without having to disconnect the mess of wires underneath it. Good Luck !!! __________________ Kenny 1990 #442

09-22-2019	#4
billschroeder5842 Join Date: Nov 2016 Location: Southlake, TX Posts: 584	Re: Radio quit I did it on my 91 a couple of years ago. A total tedious PITA. Not hard, but just a fidget. Hint, you need to go from the bottom and you will make it a lot easier for yourself if you remove the seat first. I did not (I'm not smart) and my back was messed up for about a week. It is doable and it took me 4 hours __________________ Bill Schroeder Texas Proud! 1991 Corvette ZR1 #1388 2015 Challenger Scat Pack Shaker Last edited by billschroeder5842; 09-22-2019 at 08:11 PM.

04-01-2020	#5
Young1 Join Date: Sep 2016 Location: Ocala, FL Posts: 879	Re: Radio quit I’m bringing this back up because my radio quit. All fuses checked. The antenna goes up, the radio turns on, the clock works, it selects stations, no sound. FSM says to test the receiver relay. Where is this relay? If relay is good then receiver is bad. Fun, fun to pull that too. Man did GM ever service this stuff? Two more inches on the radio head harness would have made it much easier to get the connectors apart. __________________ Steve Young 1991 ZR-1 Quasar Blue Metallic/Black #729 Second Owner 1991 ZR-1 Dark Red Metallic/Black #2040 SOLD 1990 ZR-1 Dark Red Metallic/Saddle #1670 SOLD Double your happiness.....complain half as much.

04-01-2020	#6
Ccmano Join Date: Jun 2006 Location: Sparks, NV Posts: 2,852	Re: Radio quit Dr. Don’s is the place to go for receiver and amp repairs. https://www.doctordons.com/ I’m only aware of the amplifier relay not a receiver relay. It’s to the left of the steering column near the turn signal flasher. H __________________ 90'ZR-1 #1461 Red/Black Ported Intake, Degreed Cams, OBX Headers & Exhaust, Fidanza FW, Secondary Delete, Custom tune, C6 GS Wheels. Sold 08 C6 Z51 Crystal Red Metallic Sold Vararam Intake, Tune, Sold 05 C6 Z51 Red/Black Sold 90'ZR-1 #1723 Black/Gray Sold but not forgotten 91' Z51 L98 White Vert. My First, you always remember your first. Sold.