PAC C2R-CHY4 Chrysler Radio Replacement Interface — Blue, CAN-bus, retains chimes & steering-wheel controls

The PAC C2R-CHY4 is a plug-and-play radio replacement interface that lets you swap aftermarket head units into select Chrysler vehicles while preserving warning chimes, vehicle data, and steering-wheel controls.

If you're upgrading a factory radio in a compatible Chrysler from 2005–2011, this compact CAN-bus interface handles the vehicle's digital signals so your new stereo works with existing systems. It bridges amplified and non-amplified setups, provides a 12V accessory output, and keeps essential alerts and memory features intact so you don’t lose conveniences after the swap.

Which vehicles and radios does this module support?

The C2R-CHY4 was designed for select Chrysler models using CAN Bus communication between 2005 and 2011. It contains SWI-CAN / SWI-CAN2 modules to translate steering wheel commands and system messages for most aftermarket head units.

• Compatible with many Chrysler factory harnesses from 2005–2011
• Works with both amplified and non-amplified factory audio systems
• Includes modules to translate steering-wheel input (single-wire output)
• Retains vehicle chimes, memory seat data, and warning alerts

How does it preserve vehicle warnings and memory functions?

The interface intercepts and passes CAN-bus messages so the vehicle’s central systems still receive notifications for events such as low fuel, door ajar, and backup alerts. It preserves stored data and chime signals rather than disabling them when the factory radio is removed.

• Maintains backup chime, low-fuel, door/hatch ajar sounds
• Preserves memory seat and other stored vehicle settings
• Built-in buzzer ensures audible alerts remain functional
• Retains and forwards relevant CAN data to vehicle modules

What wiring and vehicle signals does the interface provide?

This harness supplies common trigger and signal outputs installers need when fitting an aftermarket radio. It includes several dedicated outputs for power, vehicle speed sensing, illumination, parking brake, and reverse signals.

• 12V accessory output (Retained Accessory Power) to power head units
• VSS (vehicle speed signal) output for navigation or speed-based features
• Illumination, parking brake, and reverse trigger outputs
• Single-wire output for steering wheel control modules

Are there any features it does not keep?

The C2R-CHY4 preserves many factory conveniences, but some advanced driver-assist systems are not retained. The interface supplies a break wire and common accessory outputs but does not maintain blind spot detection.

• Does not retain blind spot detection systems
• Supplies a break wire where needed for factory integrations
• Designed for radio replacement — other vehicle modules remain separate
• Installer should verify compatibility with specific model options

Who is this for? Installers and knowledgeable DIYers swapping aftermarket radios into compatible Chrysler vehicles from 2005–2011 who want to keep factory chimes, steering controls, and vehicle data intact. The PAC C2R-CHY4 is aimed at technicians needing a reliable CAN-bus translator that supports both amplified and non-amplified systems without sacrificing essential alerts or stored settings. Always confirm vehicle year, trim, and factory audio configuration before ordering to ensure seamless integration.