This cable adapts from the original connector in the car, known as a quadlock, to standard aftermarket connectors for the new stereo, known as ISO connectors. The CANbus steering wheel control interface will retain the use of the original radio controls on the steering wheel with an aftermarket stereo. The CANbus interface generates a key present ignition supply to the new stereo, this means the stereo will turn on with the first click of the key and stay on until the key is removed from the ignition barrel. The interface also generates speed pulse, reverse gear and handbrake output signals, these are used when installing multimedia, navigation units and reverse cameras. This interface is built into the Quadlock to ISO harness adapter so installation is plug and play.
The plug and play Quadlock to ISO cable also has an adjustable built in high to low level adapter for the amplified speakers. The adapter allows the new stereo to work with the original amplifier which drives all the speakers in the car and the subwoofer. The high to low level adapter gives a much cleaner audio signal to the amplifier compared to using line output phono leads.
Installation Notes
Blue wire (Antenna turn-on Output) - Connect this to the separate blue wire usually found on our antenna adapters (21-120K, 21-139k) If not present please ignore this, it is not required!
Purple wire (Reverse Gear Output) - This wire will provide a signal to the vehicle's head unit when the vehicle is in reverse. This will trigger the video screen to show the video from the backup camera on the screen.
Pink wire (Speed Pulse Output) - Some stereos / navigation systems have a speed pulse wire and this tells the new stereo how fast or slow the vehicle is travelling.
Green wire (Parking Brake Output) - If your new stereo has a touchscreen or video monitor, this wire acts as a switch to turn on the video monitor when the parking brake is engaged.
PLEASE NOTE: A dedicated 49-Series patch lead MUST be ordered with this product. This links the steering control interface to the steering wheel control input on the back of the new stereo
| Radio Being Fitted | Part Number | Short Description |
| Chinese/ Unbranded | 49-000 | Patch lead for 49- Series Steering wheel control for Resistive Programming, Chinese, Xtrons, Pumpkin, Joying or unbranded stereo. |
| Alpine | 49-001 | Patch lead for 49- series steering wheel control for Alpine stereo. |
| Clarion | 49-003 | Patch lead for 49- series steering wheel control for Clarion stereo. |
| JVC | 49-004SW | Patch lead for 49- series steering wheel control for JVC stereo. |
| Kenwood | 49-005 | Patch lead for 49- series steering wheel control for Kenwood stereo. |
| Pioneer | 49-007 | Patch lead for 49- series steering wheel control for Pioneer stereo. |
| Sony | 49-008 | Patch lead for 49- series steering wheel control for Sony stereo. |
| Zenec | 49-011 | Patch lead for 49- series steering wheel control for Zenec stereo. |
| Universal | 49-025 | Self pinning (instructions included) patch lead for 49- series steering wheel control for Alpine, Clarion, JVC, Kenwood, Pioneer or Sony stereo. |
Brand: InCarTec
Car models: The years stated refer to the model's years of manufacture, please check the item description for information about any changes there may be within these productions years.
Audi - A4 (B7) (2005 - 2008)
Audi - A4 Cabriolet (2001 - 2009)
Audi - R8 1st Gen (Type 42) (2006 - 2015)
