Here is the stereo radio wiring information for your 2008 Honda Ridgeline with the standard or amplified systems. It will be useful when installing an aftermarket radio, sound stereo system, or other automotive accessories. Make sure to grab the appropriate tools to test all the wires in your Ridgeline. Please check it over and use it as a GUIDE to help you locate the appropriate wires. This schematic is provided free of charge and may not be 100% accurate. Failure to properly test all the wires may lead to vehicle or bodily damage. All information is provided as-is and accuracy is not guaranteed.
If you find any conflicting info please leave a comment with what you found in your 2008 Honda Ridgeline. If you don’t see the audio radio wiring diagram you need comment and we will try to add it ASAP. Thanks for looking!
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2008 Honda Ridgeline Audio Wiring Radio Diagram Schematic Colors
Car Radio Constant 12v+ Wire: White – Pin 10
Car Stereo Ground Wire: Black – Pin 20
Car Radio Ignition Switched Wire: Yellow/Red Pin 2 @ Radio Harness
Car Stereo VSS Speed Wire: N/A
Car Stereo Reverse Wire + : Green (+) @ Light
Car Stereo Dimmer Wire: Red @ Pin 19
Car Radio Illumination Wire: Red/Black (Parking Lights) @ Pin 9
Car Stereo Power Antenna: Black (+) Pin 3 @ Antenna Plug
Car Radio Amp Turn On Wire: N/A
Left Front Speaker Wire (+) Positive: Light Green – Pin 8
Left Front Speaker Wire (-) Negative: Violet – Pin 18
Right Front Speaker Wire (+) Positive: Blue – Pin 7
Right Front Speaker Wire (-) Negative: Red – Pin 17
Left Rear Speaker Wire (+) Positive: Brown/White – Pin 6
Left Rear Speaker Wire (-) Negative: Red/Yellow – Pin 16
Right Rear Speaker Wire (+) Positive: Red/Blue – Pin 5
Right Rear Speaker Wire (-) Negative: Yellow – Pin 15
Center Channel Speaker Wire Positive / Negative: N/A
Subwoofer Speaker Wire Positive / Negative: Yellow/Black & Light Green/Red
These wires let you keep your OEM aux jack to work with your new aftermarket radio. Grab a cheap RCA Auxiliary Cable plug either the aux or the rcas into the back of your new aftermarket radio depending on what type of audio input they have. Then cut off the other end and splice into the following wires at the 14-pin connector found behind the radio:
OEM AUX Audio Left Signal: White @ 6 pin connector pin 5
OEM AUX Audio Left Ground: Red @ 6 pin connector pin 4
OEM AUX Audio Right Signal: Brown @ 6 pin connector pin 3
OEM AUX Audio Right Ground Red @ 6 pin connector pin 4
Radio Size: Single or Double Din
Speaker Size Front: 6.5″
Speaker Size Rear: 6.5″
Speaker Size Subwoofer: 8″
Use the adapters below to install common 6.5″ speakers in the doors. Depending on the size and depth of speakers you still may need to cut some of the door metal away. Use some tin snips to easily get the job done.
Radio Removal: Using plastic bezel removal tools carefully pop the radio bezel from the dash. Unplug all the connectors and remove the dash bezel. The radio and pocket below is then held in with 5 screws.
Keep in mind if you are installing a new radio you need the mounting kit, the wiring harness, the antenna adapter, and the steering wheel control adapter if you have audio controls on the wheel you want to keep.
REQUIRED PARTS FOR AFTERMARKET RADIO INSTALL
ANTENNA ADAPTER FOR INSTALL:
GRAY MOUNTING KIT FOR DOUBLE DIN AFTERMARKET RADIOS:
TAN MOUNTING KIT FOR DOUBLE DIN AFTERMARKET RADIOS:
GRAY MOUNTING KIT FOR SINGLE DIN AFTERMARKET RADIOS:
TAN MOUNTING KIT FOR SINGLE DIN AFTERMARKET RADIOS:
CUSTOM UNDER SEAT BOX ENCLOSURE FOR ADDING AFTERMARKET SUB WOOFER:
SPEAKER WIRING ADAPTER FOR INSTALL:
Use these if you don’t want to tap in or cut off your existing speaker connectors. They plug right in then right on to the new speaker making installation a breeze. Order quantity 2 if doing front and rear speakers.
STEERING WHEEL CONTROLS ADAPTER:
RECOMMENDED TOOLS FOR THE INSTALL – SAME ONES THE PROS USE!