Question about Scosche Industries SCOSCHE GM21SR 2006-UP GM LAN STEREO REPLACEMENT INTERFACE WITH ONSTAR

3 Answers

I have a 2007 Monte Carlo..I installed the Scosche Gm21Sr the exact way it states o the instruction manual. The problem is that the radio stays on and wont play the music through the speakers

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  • mr_stanfield Jul 11, 2010

    The 12v constant is yellow
    12v acc is red
    illumination is orange wire
    black is ground

  • mr_stanfield Jul 11, 2010

    The ground is ran correctly and as soon as the radio is hooked up it cuts on. Even if the key isnt in the ignition and the door is open.

  • mr_stanfield Jul 11, 2010

    Its a onstar monte carlo with no bose system...when i connect the second factory plug into the scoche box the audio leaves from the door speakers and starts playing through the chime speakers very low. The sub input works fine. When i unplug the factory harness it plays through the door speakers but not through the subs. I still can get the radio to turn off

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  • Master
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Hello,
The GM21SR Is designed to be used with any aftermarket radio. To get the most current application guide information, please contact Scosche Tech Support: ...
www.scosche.com/ecom/download/GM21SR.pdf Thanks.

Posted on Jul 11, 2010

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  • Master
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Do you have On-Star in your 2007 Monte Carlo?

Is it a Bose equipped from factory?


According to my Scosche book

GM21SR is for OnStar equip Monte

GM22SR is for standard non Onstar Monte
non-Bose system only

====
As quick check disconnect the smaller power connector to the GM21SR,

Wait 2 minutes.

Key out

Reconnect the smaller power connector

key to on only (not staring) for 5 seconds and key out

Re-set the Onstar volume and the chime/dimmer programing again.



Posted on Jul 11, 2010

  • mr_stanfield Jul 11, 2010

    Its a onstar monte carlo with no bose system...when i connect the second factory plug into the scoche box the audio leaves from the door speakers and starts playing through the chime speakers very low. The sub input works fine. When i unplug the factory harness it plays through the door speakers but not through the subs. I still can get the radio to turn off

×

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  • Master
  • 1,561 Answers

Hello,

Check to ensure the radio volume is at mid or at an higher volume, perhaps, you can also check if the radio is not on mute, see the procedure to wire your radio,

Car Radio Battery Constant 12v+ Wire: Orange
Car Radio Accessory Switched 12v+ Wire: Yellow
Car Radio Ground Wire: Black
Car Radio Illumination Wire: Gray
Car Stereo Dimmer Wire: Light Brown
Car Stereo Antenna Trigger Wire: Pink
Car Stereo Amp Trigger Wire: N/A
Car Stereo Amplifier Location: N/A
Car Audio Front Speakers Size: 3 1/2′
Car Audio Front Speakers Location: Dash
Left Front Speaker Positive Wire (+): Tan
Left Front Speaker Negative Wire (-): Gray
Right Front Speaker Positive Wire (+): Light Green
Right Front Speaker Negative Wire (-): Dark Green
Car Audio Rear Speakers Size: 4′ x 10′
Car Audio Rear Speakers Location: Rear Deck
Left Rear Speaker Positive Wire (+): Brown
Left Rear Speaker Negative Wire (-): Yellow
Right Rear Speaker Positive Wire (+): Dark Blue
Right Rear Speaker Negative Wire (-): Light Blue

Take care.

Posted on Jul 11, 2010

  • 1 more comment 
  • Sulaimon Jimoh Olayemi Jul 11, 2010

    Hello,

    Sounds like the amps protect circuit is working, check speaker leads for
    shorts to ground, or the voice coil maybe shorting out in a speaker .
    Check
    with Ohmmeter or a installer.

    Take care.


  • mr_stanfield Jul 11, 2010

    So even if the ground is fine...Once i unplug on of the factory inputs from the Scosche device the musice comes back through the speakers but it cuts off the amp input

  • mr_stanfield Jul 11, 2010

    and the radio still wont shut off

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