2009 Toyota Tacoma Car Radio Wire Schematic - ModifiedLife Whether your an expert Toyota Tacoma mobile electronics installer, Toyota Tacoma fanatic, or a novice Toyota Tacoma enthusiast with a 2009 Toyota Tacoma, a car stereo wiring diagram can save yourself a lot of time. Automotive wiring in a 2009 Toyota Tacoma vehicles are becoming increasing more difficult to identify due to the installation of more advanced factory oem electronics. 2009 Toyota Tacoma | Stereo Wiring Diagram 2009 Toyota Tacoma. October 6th, 2012 Posted in Toyota Tacoma. 2009 Toyota Tacoma Stereo Wiring Information. Radio Battery Constant 12V+ Wire: Light Blue Radio Accessory Switched 12V+ Wire: Gray The stereo wiring diagram listed above is provided “as is” without any kind of warranty. Use of the information above is at your own risk.