Car Stereo Radio Wiring Diagram and Wire Colors – 2005 Scion tC

Whether your an expert installer or a novice enthusiast with a 2005 Scion tC, an automotive wiring diagram can save yourself time and headaches. One of the most time consuming tasks with installing a car stereo, car radio, car speakers, car amplifier, car navigation or any mobile electronics is identifying the correct wires for a 2005 Scion tC.

The Modified Life staff has put their heads together to create an invaluable resource containing free car stereo wiring diagram, free car wiring diagram and free radio wiring diagram. Feel free to use any car stereo wiring diagram or factory radio wire colors that are listed on Modified Life but keep in mind that all information here is provided “as is” without any warranty of any kind. Use of the wiring information is at your own risk. Always verify all wires, wire colors and diagrams before applying any information found here to your 2005 Scion tC.

If you can’t find your car radio wiring diagram, factory radio wire colors or stereo wire diagram on Modified Life, please feel free to post a car wiring diagram request (Radio Wiring Diagram Request Page) and we’ll do our best to find you the information you need for your mobile installation.

2005 Scion tC Car Stereo Radio Wiring Diagram

Radio Constant 12V+ Wire: Blue
Radio Ignition Switched 12V+ Wire: Gray
Radio Ground Wire: Brown
Radio Illumination Dimmer Wire: Green
Radio Antenna Trigger Wire: Orange
Radio Amplifier Trigger Wire: N/A
Front Speakers Size: N/A
Front Speakers Location: N/A
Left Front Speaker Wire (+): Pink
Left Front Speaker Wire (-): Purple
Right Front Speaker Wire (+): Light Green
Right Front Speaker Wire (-): Blue
Rear Speakers Size: N/A
Rear Speakers Location: N/A
Left Rear Speaker Wire (+): Black
Left Rear Speaker Wire (-): Yellow
Right Rear Speaker Wire (+): Red
Right Rear Speaker Wire (-): White

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  • Reply Steve January 3, 2008 at 2:27 pm

    thanks for the free car radio wiring diagram. worked perfect. you guys are the best.

  • Reply ModifiedLife January 3, 2008 at 2:29 pm

    Glad we could help with your car radio wire diagram needs. Feel free to visit anytime.

  • Reply Thomas November 19, 2009 at 11:43 pm

    I know most stock HU do not have RCA jacks. The stock radio in my 05 tC is a Pioneer unit. Does it have RCA jacks or do I need a line-in converter, or should I just buy a new unit?

  • Reply Scott March 28, 2011 at 10:53 am

    Does anyone know if the stock radio unit comes with any input jacks in the back of the unit? It would be nice to know before removing everything.

  • Reply ModifiedLife March 31, 2011 at 7:19 pm

    Scott, you will need an automotive auxiliary input adapter. This adapter will allow you to input any mp3 player or portable music player into your factory radio. This is the easiest and most cost effective way to add an audio input into your factory stereo. Here is the adapter you will need:

    Aux Input Adapter for 2005 Scion tC

    If you’ve never installed car audio before, we advise you to take your car to an experienced mobile audio installer. Hope this helps. Good luck with your 2005 Scion tC aux input adapter installation.

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