AC Delco CD Player Problem
Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=75335
Printed Date: May 09, 2024 at 5:25 PM
Topic: AC Delco CD Player Problem
Posted By: duley3
Subject: AC Delco CD Player Problem
Date Posted: March 29, 2006 at 5:30 PM
I have an AC Delco CD Player (single disc) in my 2003 Chevy Blazer. It was working fine then all at once it just quit. The lights still come on and I don't have any errors or locked messages. All my preset stations are still there and the time is still there. I just can't get any sound from it. It is like someone just unpluged the speakers. I have check all the wires. I also thought that maybe it was my aftermarket AMP that I had. So I then bypass that and still nothing. Has anyone ever had a problem like this with an AC Delco radio? If you have and know what I should do please reply. thanks
Replies:
Posted By: duley3
Date Posted: March 30, 2006 at 10:53 AM
I now have taken the radio out just to see if I could smell anything burnt. I can't find anything wrong anywhere. Does anyone have any ideas where I should look next?
Posted By: geepherder
Date Posted: March 30, 2006 at 11:10 AM
Make sure you don't have a speaker/wire blown/shorted somewhere, other than that it sounds like the radio's bad. ------------- My ex once told me I have a perfect face for radio.
Posted By: duley3
Date Posted: March 30, 2006 at 11:55 AM
If I had a bad wire, Would that make all the other speaker quit? I read somewhere that the output amp inside might be bad. Is there anyway to test that?
Posted By: xtremej
Date Posted: March 30, 2006 at 11:59 AM
Yes, if you have bad wire it can cause you other speakers to quit by cooking the amp in the fact. unit. It can be tested but more than likely it would be cheaper to either but a used fact. unit or an aftermaket unit. No matter what you decide make sure check out your wiring so you don't have another one go bad. Good Luck.
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Posted By: duley3
Date Posted: March 30, 2006 at 12:40 PM
I have a DC metter. Do you know if there is any way to test the outputs with that? If so what kind of reading should I look for?
Posted By: xtremej
Date Posted: March 30, 2006 at 12:42 PM
I believe its ac? been while.  -------------
Posted By: duley3
Date Posted: March 30, 2006 at 12:50 PM
Well I have one of them also. What kind of reading would I look for? BTW thanks for your helping hand..
Posted By: geepherder
Date Posted: March 30, 2006 at 1:10 PM
If you're going to do that, disconnect all the speakers, and use a cd with a test tone on it. Test the speaker wires for ac voltage. However, it'd be easier to just use a test speaker and connect it to the different sets of speaker wires one by one. Only do this after you've ensured no speaker wires are grounding out. ------------- My ex once told me I have a perfect face for radio.
Posted By: kgerry
Date Posted: March 30, 2006 at 1:13 PM
yes the entire unit will lose audio with a pinch or short on even one wire.... grab a DMM, disconnect the power/speaker connector and meter each speaker wire for continuity to ground... if you get a reading on any of them then you have a short... trace it down and repair it or else cut and run new speaker wiring (whichever is easiest)...
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Kevin Gerry
Certified Electronics Technician
MECP First Class Installer
Owner/Installer
Classic Car Audio
since 1979
Posted By: duley3
Date Posted: March 30, 2006 at 1:22 PM
Thanks for the help... Everyone...
Posted By: duley3
Date Posted: March 30, 2006 at 1:38 PM
Okay I found something but I'm unsure what. I tested the pins on the back of the radio w/o it pluged in. The pins for the RR +/- have continuity But the other pins for the speakers do not. Does this mean my radio is dead? Is there any way to fix this problem (if this is it)?
Posted By: sparkie
Date Posted: March 30, 2006 at 3:17 PM
You can't test the radio in that manner. Plug the radio in and turn it on. Set your meter to a DC voltage scale and place your black meter probe on a good ground and your red probe on each speaker wire output from the back of the deck, all 8 speaker wires. You should get an reading of about 5 to 6 volts on each wire. If you don't then the wires to that speaker or the speaker itself is shorted to ground or a power wire. If all checks out OK, set your meter to an AC voltage scale and measure from a speaker output negative to the positive. You should get AC voltage. If you don't you probably have a bad radio. If you do get AC voltage, then you need to look at the rest of the system/speakers for a problem.
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sparky
Posted By: duley3
Date Posted: March 30, 2006 at 5:04 PM
sparkie wrote:
Plug the radio in and turn it on. Set your meter to a DC voltage scale and place your black meter probe on a good ground and your red probe on each speaker wire output from the back of the deck, all 8 speaker wires. You should get an reading of about 5 to 6 volts on each wire. If you don't then the wires to that speaker or the speaker itself is shorted to ground or a power wire. .
Well I didn't get anything from the RR channel (either wire) . So I cut the wires at the back of the radio just to see if it was a short in the wires and still nothing. I'm almost pos. that it is in the radio and not the wires to the speaker. Thanks again everyone... Time for a new one.
Posted By: kgerry
Date Posted: March 31, 2006 at 8:31 AM
when you cut those two speakers wires did you then meter them ( going to the speaker) for a short to ground? did you get a continuity reading? if yes, then you have a short... if not, hook up a test speaker to the two leads coming from the radio ( in circuit) does the speaker play audio? if no, you have a blown channel, if yes then you have a DOA speaker ( probably open VC)....
-------------
Kevin Gerry
Certified Electronics Technician
MECP First Class Installer
Owner/Installer
Classic Car Audio
since 1979
Posted By: duley3
Date Posted: March 31, 2006 at 9:46 AM
No short in the wires to the speakers. No sound with a speaker on any of the channels out from the radio. The only set of +/- ouput pins (on the back of radio) for the speaker that I get continuity from are the ones for the RR . I'm sure it is in the radio. Is there any way to find out on the board in the radio which is the RR and just get rid of that channel? The reason I ask is because I have looked around for a replacement radio (stock) and they are too high for my pocket right now..
Posted By: duley3
Date Posted: March 31, 2006 at 9:51 AM
sparkie wrote:
red probe on each speaker wire output from the back of the deck, all 8 speaker wires. You should get an reading of about 5 to 6 volts on each wire. .
Oops . I forgot.. I also had DC volts on all the other channels but not the RR.
Posted By: sparkie
Date Posted: March 31, 2006 at 2:08 PM
If you had DC voltage on all but the RR output then you have a problem with either the RR speaker wire or the speaker. Cut the RR speaker wires a few inches away from the radio and don't let them touch themselves or anything else. The radio should play on all other speakers if it is still OK. If it does, hook a test speaker up to the two wires for the RR channel off the back of the radio. If it plays, then try a new RR speaker or new wires to it. The speaker wire may not show a ground to it depending on its configuration. The reason you are not getting DC voltage is because something is likely grounding that radio output out. It could still be the radio is defective, but something likely caused it to go bad and you need to repair that. It is possible to get the radio fixed, which will be cheaper than replacing it.
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sparky
Posted By: duley3
Date Posted: March 31, 2006 at 3:23 PM
sparkie wrote:
If you had DC voltage on all but the RR output then you have a problem with either the RR speaker wire or the speaker. Cut the RR speaker wires a few inches away from the radio and don't let them touch themselves or anything else. The radio should play on all other speakers .
I thought of that already and tried it still nothing (voltage or sound) . That is why I'm sure it is in the radio. I wish I could just get rid of that channel in the radio..
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