How do I wire an aftermarket radio?

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I have a 25 Pontiac g6 gt with the monsoon sound system, my 6 disc cd changer recently gave out and keeps flashing “cd changer error” which is annoying as hell! So I want to get an aftermarket radio but I don’t want to buy the 2$ wiring harness, I don’t care about steering wheel controls, or door chimes. If anyone has any idea on how to bypass that stupid wiring harness that would be great! Also, where can I buy the dash kit so the aftermarket deck fits?

✅ Answers

? Best Answer

  • If you go to crutchfield.com and put your vehicle information in their “outfit my car” thing, it will bring up all parts you need including the harness you SHOULD get. Right now that harness is only $50 and the antenna adapter and kit are free if you buy a radio from them. Definitely recommend going that route. Btw you dont want to try hardwiring your radio in that car if you dont have any experience. From my experience 90% of people to try to do their own installs end up takin it to a shop anyways because they couldnt figure it out or messed something up. If you would still like to hardwire the radio for some reason you can find everything but the accessory wire behind the radio. To catch accessory there is a green 6 pin plug with a brown wire in it at the ignition switch in the car. You can catch the brown wire to turn the radio on and off with the car. Just make sure you put a fuse inline when you make that connection!

    Radio 12V red/white + radio
    Radio Ground black/white – radio
    Radio Ignition (low speed GMLAN)
    Radio Illumination (low speed GMLAN)
    Factory Amp Turn-on same as power antenna
    Power Antenna pink + radio
    Left Front Speaker (+/-) tan – gray +,- radio or amplifier under rear deck
    Right Front Speaker (+/-) lt. green – dk. green +,- radio or amplifier under rear deck
    Left Rear Speaker (+/-) brown – yellow +,- radio or amplifier under rear deck
    Right Rear Speaker (+/-) dk. blue – lt. blue +,- radio or amplifier under rear deck

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