PAC RP4-CH11 Tech Brief

Brand: PAC

Model: RP4-CH11

Type: Tech Brief

PAC RP4-CH11 is a compact and versatile module designed to integrate aftermarket radios into vehicles with factory amplified systems, providing a seamless and powerful audio experience. This device features:

Vehicle-specific compatibility: It is engineered to work with select vehicle models, ensuring easy installation and compatibility with the factory audio system.
Retains factory features: The PAC RP4-CH11 enables you to retain essential factory features such as steering wheel controls, chimes, and warning messages, preserving the original functionality of your vehicle.
Signal processing: Its advanced signal processing technology delivers clean and clear audio output, enhancing the overall sound quality of your music, navigation prompts, and phone calls.

Vehicle-specific compatibility: It is engineered to work with select vehicle models, ensuring easy installation and compatibility with the factory audio system.
Retains factory features: The PAC RP4-CH11 enables you to retain essential factory features such as steering wheel controls, chimes, and warning messages, preserving the original functionality of your vehicle.
Signal processing: Its advanced signal processing technology delivers clean and clear audio output, enhancing the overall sound quality of your music, navigation prompts, and phone calls.

Please read through the entire tech brief before performing any actions to prevent damage to the vehicle, module, or aftermarket equipment.

In vehicles where the RP4-CH11 is used, the module may lock up after installation has been complete and the radio will no longer power on

until the module is disconnected and reconnected to the PAC harness. When this issue occurs, the radio will not power on and the status LED

on the module will not be illuminated when the key to the vehicle is turned to the accessory or ignition/run position

Engineering currently is investigating the root cause of the issue and has requested we release the fix below to rectify modules affected with

this problem.

RP4-CH11 – Modules no longer powering

on after some time.

DESCRIPTION OF PROBLEM

RESOLUTION

The harness will need to have the constant (Yellow) wire that goes directly to the RP4-CH11’s black module connector cut in

half before the fuse on the harness and connected to the vehicle’s accessory outlet (cigarette lighter port). Tape off the end

of the yellow wire coming from the OE vehicle connector from the PAC harness to prevent damage to any wiring,

equipment, or the vehicle.

REV – 1.07 – 09/ 14/2023

TECHNICAL SUPPORT 727-592-5991

STEP 1 – Identify and cut the 12 Volt constant wire on the

RP4-CH11 harness to the module. Be sure you locate the

wire going to the module connector. (GREEN)

STEP 2 – Tape the vehicle side of the constant wire off

safely (GREEN). Connect a wire to the module side of this

wire long enough to reach the accessory port. (BLUE)

Use the images below as a visual guide to this tech brief.

TECH BRIEF

TO ACC PORT

STEP 4 - Connect the wire from the RP4-CH11 harness to the

positive switched accessory wire located in pin 1 of the

accessory port connector.

STEP 3 –Route the wire from the RP4-CH11 harness to the

accessory port. The image below shows the routing for a

Jeep Wrangler for reference.

If this issue persists, please contact technical support using the number below.

PAC RP4-CH11 Tech Brief

Brand: PAC

Model: RP4-CH11

Type: Tech Brief

Vehicle-specific compatibility: It is engineered to work with select vehicle models, ensuring easy installation and compatibility with the factory audio system.
Retains factory features: The PAC RP4-CH11 enables you to retain essential factory features such as steering wheel controls, chimes, and warning messages, preserving the original functionality of your vehicle.
Signal processing: Its advanced signal processing technology delivers clean and clear audio output, enhancing the overall sound quality of your music, navigation prompts, and phone calls.

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PAC RP4-CH11 Tech Brief

PAC RP4-CH11 Tech Brief

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