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© 2018 AAMP Global. All rights reserved. PAC is a Power Brand of AAMP Global.
PAC-audio.com
Rev: V3
Date: 060118
Introduction and Features
Important Notes
Wiring Connection Chart
The C2R-AUDI interface allows the replacement of a factory radio in select Audi vehicles with CANbus radios. The C2R-
AUDI also provides a secondary output for adding an optional PAC Steering Wheel Control (SWC) retention interface
(SWI-RC, SWI-CP2, SWI-X). The C2R-AUDI also provides data bus driven outputs such as retained accessory power
(RAP), vehicle speed sensor (VSS), illumination, reverse trigger and parking brake.
1. A PAC steering wheel interface must be used in conjunction for SWC retention.
2. Only one of the two provided radio harnesses will be used. Remove the factory installed radio to determine the correct harness
for your particular vehicle.
3. Vehicles without a factory amplier: Connect the aftermarket radio’s front and rear speaker wires to the 22-pin plug (dock-
n-lock connector) or 16-pin plug (ISO Connector).
4. Vehicles with a factory amplier: To determine whether the amplier needs RCA or speaker level input, check the OEM side
of the 22-pin or 16-pin connector (depending on which connector your vehicle has behind the radio) to see if the speaker wires
are populated. If so hook the front speaker outputs to the main connector and the rear RCA outputs to the 22-pin connector
(dock-n-lock connector) or 16 / 20-pin connector (ISO Connector). If there are no factory speaker wires located in the OEM
main connector then you will need to hook all 4 of the RCAs from the C2R-AUDI harness to the aftermarket radio’s RCA
outputs. The blue RCA has no function at this time (dock-n-lock connector only).
5. The Red accessory wire supplies +12v, 1 Amp max when key is in the accessory or ignition position (see g. 1: If more current
is needed).
Red / White Parking Brake Output (-)
Purple / White Vehicle Speed Output
Blue / White Amp Turn On Input
Red Accessory Output
Orange / White Illumination Output (+)
Green Reverse Output (+)
Interface Connector
Yellow Battery +12v
Black Ground
White Front Left + input
White / Black Front Left - input
Gray Front Right + input
Gray / Black Front Right - input
Green Rear Left + input
Green / Black Rear Left - input
Purple Rear Right + input
Purple / Black Rear Right - input
Vehicle Connector
Fig. 1
(using a SPDT relay)
85 86
30
87
87a
Ground
High Current 12v
(Fused)
12v Acc.
From
Interface
New High
Current Output
Diode 1N4005
or equivelant
