CRUX SWRAD-55

Radio Replacement with Steering Wheel Control Retention for Select Audi Vehicles with ISO or Quadlock Connectors

Product Features

Retains factory features in select Audi vehicles while functioning with an aftermarket radio.
Supports amplified and non-amplified systems.
EIA color coded wiring for easy installation.

Note

Does not retain rotary type Steering Wheel Controls (SWC).

Parts Included

SWRAD-55 MODULE
Quadlock Harness
ISO Harness
SWC Cables

Installation Diagram

The installation diagram illustrates the connection between an aftermarket radio, the CRUX SWRAD-55 module, and the vehicle's factory harness. On the right, an "AFTERMARKET RADIO" is depicted with input ports. In the center, the "CRUX SWRAD-55 MODULE" is shown with a "12-Pin Connector". To the left, there are two options for connecting to the vehicle's factory harness: either the "ISO Connectors Harness" or the "QuadLock Connector Harness", indicated by an "OR" symbol. Below the module, "3.5MM SWC CABLES (Option A or B)" are shown, connecting to a "4-Pin Connector" on the module. Option A shows a direct 3.5mm plug, while Option B shows wires that can be cut and connected separately. A note indicates to "Cap or insulate if not being used" for the Blue/Yellow wire.

Detailed wire color codes and their functions are provided:

Reverse Trigger: Red/White
Illumination (+): Orange
Bose Amplifier Turn-on: Blue
+12V Constant: Yellow
+12V ACC: Red
Ground: Black
Antenna Amplifier: Blue
Vehicle Speed Sense (VSS): Violet/White
Ground for Bose System: Black
Right Front (+): Gray
Right Front (-): Gray/Black
Left Front (+): White
Left Front (-): White/Black
Right Rear (+): Violet
Right Rear (-): Violet/Black
Left Rear (+): Green
Left Rear (-): Green/Black

The diagram also shows the corresponding connections for the aftermarket radio's inputs: Front Left (White), Front Right (Gray), Rear Left (Green), Rear Right (Violet).

DIP Switch Settings

The "AFTERMARKET RADIO DIP SWITCH SETTINGS" table lists aftermarket radio brands and their corresponding DIP switch configurations (DIP# 1, 2, 3). For example, "Atoto, Dual, Fahrenheit, Jensen" requires DIP# 1 ON, 2 ON, 3 ON. "Alpine" requires DIP# 1 OFF, 2 OFF, 3 OFF. A visual representation of the "SWC MODULE DIP SWITCH" with numbered positions 1, 2, 3 is also provided.

Note: For Atoto, Blaupunkt, Dual, Farenheit, Power Acoustik, Soundstream, and most off-brand radios, check the aftermarket radio's manual to see if the SWC buttons need to be programmed.

3.5MM SWC Cable Usage

The 3.5MM SWC Cable connects the aftermarket radio's steering wheel control input to the SWRAD-55 module via the module's 4-pin port. If the aftermarket radio uses separate wires for SWC connections (SWC1, SWC2, Ground), the 3.5mm plug on the CRUX SWC Cable (Option B) can be cut off. The wires should then be connected as follows: RED to SWC Key 1, WHITE to SWC Key 2, and SHIELD to SWC Ground. If the radio only has SWC1 and SWC2 inputs, the shield connection is not necessary. The Blue/Yellow wire or the 3.5mm plug should be insulated if not being used.

RCA Connectors Usage

For Bose System: Connect all 4 (front and rear) RCA connectors only. No speaker wire connections needed.
For Non-Amplified Systems: Connect the 8 speaker wires. No RCA connection is needed.
For Vehicles with Rear Factory Subwoofer amplifier: Connect the front channel speaker wires only. Then connect the rear RCA connectors.

Vehicle Model	Years	Vehicle Model	Years
Audi A3	2002 - 2010	Audi A6	2002 - 2004
Audi A4	2001 - 2009	Audi S4	2004 - 2009
Audi A5	2008 - 2010	Audi Q5	2009 - 2010
Audi TT	2002 - 2010

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