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Radio not working

Tiny
UHSNOEBIRD
  • MEMBER
  • 1993 CHEVROLET TRUCK
  • 4.0L
  • V8
  • 2WD
  • AUTOMATIC
  • 120,000 MILES
I've checked the fuses went to a junk yard and have tried 2 different radios plus 2 CDM'S and none of the 3 radio's and CDM'S will work. This radio will not turn on. I checked the antenna wire to make sure there was no water in the connection and none was there. Any help will be appreciated. Thank you
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Monday, August 24th, 2020 AT 7:35 PM

13 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,300 POSTS
Hi,

First, in addition to checking the fuse, confirm there is power to it. See pic 1 for radio fuse. Pic 4 shows fuse location in vehicle. Here is a link to help with testing:

https://www.2carpros.com/articles/how-to-check-a-car-fuse

If the fuse is good and power is available, check the yellow wire in the connection to the rear of the radio for ignition power. See pic 2.

If there is power, then check the ground for the radio. See pic 3

_________________________________

Let me know what you find or if you have other questions. Note the schematics are for an AM/FM CD with AMP. If you have something different, let me know.
Joe

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Monday, August 24th, 2020 AT 8:27 PM
Tiny
UHSNOEBIRD
  • MEMBER
  • 342 POSTS
The radio lights up but when I power it on it doesn't work.
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Tuesday, August 25th, 2020 AT 12:35 PM
Tiny
UHSNOEBIRD
  • MEMBER
  • 342 POSTS
It has another electronic part that's under the dash board called the control data module that feeds to the radio plus the antenna connects to this part.
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Tuesday, August 25th, 2020 AT 12:44 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,300 POSTS
Hi,

Are you referring to the control head when you say control data module? See attached pic. Also, when you turn it on, does it turn on and there is no sound?

Joe
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Tuesday, August 25th, 2020 AT 8:07 PM
Tiny
UHSNOEBIRD
  • MEMBER
  • 342 POSTS
It will not turn on, but there are some things lit up but nothing can be done with the radio.
Youtube. Com/watch?V=H3oFXfPl0j4

watch this video, the CDM, control data module is talked about in this video.
I've changed all of it out with the radios and CDM's, nothing has worked.
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Tuesday, August 25th, 2020 AT 8:23 PM
Tiny
UHSNOEBIRD
  • MEMBER
  • 342 POSTS
The radio will not turn on period.
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Tuesday, August 25th, 2020 AT 8:24 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,300 POSTS
Hi,

Are you sure that is the correct YouTube link? I just watched a Russian Misuc Video. LOL
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Tuesday, August 25th, 2020 AT 8:31 PM
Tiny
UHSNOEBIRD
  • MEMBER
  • 342 POSTS
I just copied and pasted the link to the video here it is:
https://www.youtube.com/watch?v=H3oFXfP1Oj4
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Wednesday, August 26th, 2020 AT 4:39 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,300 POSTS
Hi,

I did watch the video. According to the speaker, if the radio won't power up, then it's a problem with the CDM. I realize you have replaced things already. Are they new parts? If used, did they work together in the prior vehicle? Have you confirmed power to the radio from the CDM? I know you checked the radio fuse, but is the courtesy fuse good as well and showing power?

Joe
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Wednesday, August 26th, 2020 AT 6:40 PM
Tiny
UHSNOEBIRD
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All fuse are good, there's power to the radio, it lights up. The other radio's came from a junk yard, not sure if they work or not.
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Wednesday, August 26th, 2020 AT 8:11 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,300 POSTS
That what I suspect may be wrong. I'm not sure if the place you are getting the parts will return your money if they don't work, but you should return them and see if you can find a used on that is known good and comes with some kind of a warranty. If you think about it, this style hasn't been used for some time, so they may have been in the salvage yard for some time. In some cases, they can be exposed to the elements.

I wish I had a certain answer for you.
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Wednesday, August 26th, 2020 AT 8:28 PM
Tiny
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Thanks.
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Thursday, August 27th, 2020 AT 3:57 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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You are very welcome. Please feel free to come back in the future if you have questions.

Take care,
Joe
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Thursday, August 27th, 2020 AT 8:18 PM

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