Audi Radio Replacement Interface:
The CRUX SWRAD-55 is a radio replacement interface for select 2001-2010 Audi
vehicles. It facilitates the integration of an aftermarket radio to enable
retention of factory features when replacing a factory installed radio in select
Audi cars. This interface is also pre-programmed for retention of
steering wheel controls.
Compatibility: The CRUX SWRAD-55 is
supported by the following 2001-2010 Audi vehicles; with non-amplified or
amplified factory audio systems (including Bose).
Steering Wheel Control Retention: The CRUX SWRAD-55 also
features a steering wheel control output for Pioneer, Sony, Alpine, Clarion, Kenwood, JVC, and Blaupunkt aftermarket head units. The steering wheel control output
consists of a right-angle 3.5mm connector and a light blue/yellow wire (use the
connection that your aftermarket head unit is fitted with). The SWRAD-55 interface module will work with
any of the listed aftermarket head units, by setting its three dip-switches (see
owner's manual for appropriate setting).
- The steering wheel control harness features two 4-pin
connectors (labeled - Pioneer/Sony and Alpine/Clarion/Kenwood/JVC). You will
only plug in one of these connectors to the interface module, based on the
type aftermarket head unit you are installing.
- The Phone/Voice button on the steering wheel controls is not
retained in the 2006 AUDI A3 Hatchback with Concert Radio.
Navigation Outputs: The CRUX SWRAD-55
radio replacement interface module provides a VSS (vehicle speed sense)
and a Reverse Gear output to make installing an aftermarket Navigation radio
simpler and less time consuming.
Amp Turn-On: The CRUX SWRAD-55
provides an amplifier turn-on lead for your vehicle's factory amplifiers (if
Make sure to connect this wire if your vehicle features a factory Bose system or
factory rear sub.
Wiring Harness: The SWRAD-55 includes two wiring harnesses;
there is a 3-connector factory harness (20-/8-/8-pin) and a 1-connector
(44-pin) factory harness. Only one will be used based on the type of factory plug
behind your radio. Each harness also features a 12-pin connector that plugs into
the SWRAD-55 interface module. The wiring harness also provides bare-wire leads
(power/ground, speaker, illumination, turn-on, and navigation) which will need to be hardwired to your aftermarket head unit's
wiring harness. In addition, RCA connectors are provided for vehicles with
factory amplifiers. These RCA connectors plug into the RCA preamp-outputs on the
back of your aftermarket head unit.
||+12 Volt Accessory
||+12 Volt Constant
||Left Front Speaker +
||Left Front Speaker -
||Right Front Speaker +
||Right Front Speaker -
||Left Rear Speaker +
||Left Rear Speaker -
||Right Rear Speaker +
||Right Rear Speaker -
||VSS (vehicle speed sensor)
||Left Front Speakers
||Right Front Speakers
||Left Rear Speakers
||Right Rear Speakers
Notes: Speaker and RCA connection will depend on what type of
factory audio system you have in your vehicle.
- For Non-Bose Systems: Connect the eight speaker wires of this
harness to the front & rear speaker wire leads of your aftermarket head unit's wiring harness (RCA-connectors
are not used).
- For Non-Bose Systems w/ Rear Factory Sub Amp: Connect the
front channel speaker wires of this harness to the front speaker wire
leads of your aftermarket head
unit's wiring harness; then connect the rear RCA connectors of this
harness to your aftermarket head unit's rear-channel preamp outputs (in
this scenario, your aftermarket head unit must be equipped with at least
two preamp outputs).
- For Bose Systems: Connect all four RCA connectors (front &
rear) of this harness to your aftermarket head unit's front &
rear-channel preamp outputs (speaker wire leads are not used). Your
aftermarket head unit must be equipped with two sets of preamp outputs
(front & rear).
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