Audio Systems: Car Radio, digital encoder, spray rock


Question
I have a similar problem to what is listed below. Only difference is that I've tried a different radio to have the same result. The radio that I swithed in was from a 96 Cavalier that worked perfectly. So two radios in the same car means that the radio isn't to blame, so what is? I've already asked a different "expert" and got a pretty unsatifactory answer.  I do NOT want to replace anything unless it is the part that is broken.  Any help would be appreciated.  
Thanks,
-C

Date: 2/1/2005 Subject: Pontiac/Delco Volume Control in '97 Grand Am   

Question

Hi,   I have a '97 Grand Am GT with a Delco stereo with CD player and equalizer. Lately the volume control has been acting up. When I try to turn the volume up, it goes down, and vice versa. Most of the time the volume goes down when I try to turn it up. Sometimes it actually does go up, and sometimes it really goes up! It is driving me crazy. I had the display bulb go out on me a few years ago and fixed that with no problem. Do you know if this is something that could be fixed with relative ease or would I be better off getting a new radio?   

Thanks a bunch,   

John    

Answer

John, If this stereo uses a volume knob/control that doesn't have a stop, but it will continually turn around and around as you raise or lower the volume the problem may be with the control itself. This type of control is an digital encoder and this unit when it gets worn or dirty will do all kinds of strange things with the volume. In many cases a light spray with a control/contact cleaner will make the encoder work like new. These encoders are sealed pretty good so it may take some time until the cleaner works its way into the control. After a light spray, rock the control back and forth. And, if the control is a push button type the electronic volume control circuit is at fault.     

TOM,
T&D ELECTRONICS
tdeser@zoominternet.net    

Answer:

Because I happen to own a 98. Delco is poor quality. I would just yank it all and put in a decent aftermarket system with new speaker wiring. This is too much fuss over such an old stock system.

Expert: Jerry Mael

Answer
I am wondering why you are wrestling with 12 year old radio units!

Seems both of the radios are defective.  I suggest you get new merchandise for the car.  They are not expensive if you get a basic unit.

Fixing the volume control action will require pulling it and sending it into a shop or taking it in. The repair will cost more than a new low end radio.  

Life expectancy of a car radio unit is not so long and the vintage you are working with was when they were just getting into IC controlled features and functions so they were not so reliable.

Got to crutchfield.com and walk through their "outfit your car" for choices of radios that will fit your panel, etc.  You don't have to purchase it from them, but Crutchfield has good advice on what fits and works with each car model.

Best wishes,
C