Question about 2002 Chevrolet Impala

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Replaced radio and amplifier in trunk and checked all fuses. Still no sound but radio lights up and keeps time etc. just no soumd at all. Please can someone help my son goes back to school Sunday evening. Thanks in advance! Rick

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  • Master
  • 4,044 Answers

Hmmmm. You replaced the Amplifier and CD changer in the trunk but did he replace the actual Radio? Volume control is from the Unit in the passenger area between driver and passenger. If the Volume circuit in that isn't working then the rest will fail. If you are only having trouble with the CD in the trunk it is most likely a connection and you will have to trace the wires. There is an easy way to find out however, well easy compared to other things I have done. Go to the amplifier in the trunk and disconnect the speaker wires that feed it. Using a cheap battery operated radio connect to the Amplifier IN wires and see if you can hear the portable radio. If you can this confirms the problem. If you can't hear it try connecting to the speakers directly on the output side of the amplifier and see if you can hear the portable radio. If you can't it's time to take a spare speaker and connect it to the Output side of the amplifier and get any volume. Your are checking that the amplifier is actually working and checking for a grounded speaker wire that is shorting your system. In order to find these you have to isolate them to a specific area. Most vehicles with Amplifiers mount those and CD changers in the trunk but all operations are still controlled by the actual radio in the Dash. I believe this is your problem.

Posted on Aug 07, 2010

  • 2 more comments 
  • rsimonski Aug 08, 2010

    The radio, cd and tape player are all in the same unit located in the car front dash panel. This unit was replaced first with no luck and then the power amplifier in the trunk was relaced again with no luck. I suspect the amplifier in the trunck is not receiving any or enough voltage to work. I checked both orange wires and ground and did not get any power. I assume I should have read 12 volts is this correct? Rick

  • James Young Aug 08, 2010

    Wire colors vary by year and model but you should have found a constant hot there somewhere, +12 volts. If the vehicle has a separate amplifier that was installed by the factory there is a fuse in the fuse panel for it and you need to check it. If it is one of those after market amplifiers installed by someone else there is probably an in line fuse inside a clear plastic container. This is normally located in the engine compartment and connects directly to the battery. If you have this check the connection at the battery and that fuse. If your getting power to the radio and amp and no volume the problem could be either. If your getting power to the radio but not the amp and the amp is factory installed you need to double check the fuses and trace the wires. Using a portable radio with a couple of wires attached to a speaker to feed the amplifier you can isolate the problem to either the radio or the amp by removing the equation and replacing it with the portable at the amplifier. You just need to identify the "In -Lines" for the amp and attach the portable radio to them.

  • rsimonski Aug 08, 2010

    I found the problem to be an orange power feed wire in the passenger side rear door scuff plate that totally corroded open. Evidently water came into the car interior through the fresh air vent below the front windshield and ran back though the wire harness tunnel. The splice area was just past the passenger rear door pillar where one of the orange wires was spliced into two smaller orange wires that provided power to the factory amplifier. Respliced the wires and now works great. Please pass this on as the most likely failure mode for this vehicles inop radio when the radio lights up but no sound. RICK

  • chaddy Jul 20, 2012

    how did you replace the wires....amd whats the name of the wires

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Dennis my 1995 lincoln towncar JBL radio quit producing sound the system comes on fine but I get no sound could u help me please, what is the problem?


The Amp in the trunk might have blown,
Town Car Radio Wire Diagram
Car Radio Battery Constant 12v+ Wire: Pink/Light Blue
Car Radio Accessory Switched 12v+ Wire: Yellow/Black
Car Radio Ground Wire: Black/Light Green
Car Radio Illumination Wire: Light Blue/Red
Car Stereo Dimmer Wire: Blue/Red
Car Stereo Antenna Trigger Wire: Blue
Car Stereo Amplifier Location: Trunk
Car Audio Front Speakers Size: 5? x 7? Speakersir?t=modilife-20&l=as2&o=1&a=b00009uhre
Car Audio Front Speakers Location: Doors
Left Front Speaker Positive Wire (+): Orange/Light Green
Left Front Speaker Negative Wire (-): Light Blue/White
Right Front Speaker Positive Wire (+): White/Light Green
Right Front Speaker Negative Wire (-): Dark Green/Orange
Car Audio Rear Speakers Size: 6? x 9? Speakers[img src="http://www.assoc-amazon.com/e/ir?t=modilife-20&l=as2&o=1&a=B00009UHRE" width="1" height="1" border="0" alt="">
Car Audio Rear Speakers Location: Rear Deck
Left Rear Speaker Positive Wire (+): Gray/Light Blue
Left Rear Speaker Negative Wire (-): Tan/Yellow
Right Rear Speaker Positive Wire (+): Orange/Red
Right Rear Speaker Negative Wire (-): Brown/Pink
Check the fuses

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1 Answer

I have a 1995 lincoln towncar and the radio comes on but I no longer have sound, please help, what's wrong with it?


I think I already answered this... but there is an amplifier behind the back seat in the trunk area, and there is a fuse on it. Start by replacing that fuse.

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Hi Toxey.

Does your trunk amplifier got power.
basically amp need remote power input it is coming from your radio.
please check when you turn on the radio remote power must turn on.
if no it is radio problem or wire is damaged itself.
please check the outputs,speakers with multimeter or single 1.5v cell.
if power is ok.and the remote on signal is ok your device still not working , it is the problem with power amplifier unit.

please check and let us know the status.
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