PAC LPHGM72 Integration T-Harness User Manual

Product Overview

The PAC LPHGM72 Integration T-Harness is designed to simplify the installation of aftermarket audio equipment in compatible GM vehicles. This harness provides all necessary high-level inputs and speaker outputs, ensuring seamless integration with your vehicle's existing audio system.

Image: The PAC LPHGM72 T-Harness, featuring the main wiring harness with multiple labeled pigtail connectors for power, front speakers, rear speakers, and subwoofer integration.

Key Features:

• Simplified Installation: Provides all necessary high-level inputs and speaker outputs for aftermarket audio equipment.
• Optimized for GM Vehicles: Specifically designed for 2019-2022 iOS IOT non-amplified GM vehicles.
• High-Quality Materials: Constructed with copper and RCA connectors for reliable audio transmission.
• Extensive Compatibility: Compatible with LOC-PRO Line Output Converters, Audiocontrol Amplifiers, and Audiocontrol DSPs.
• Comprehensive Kit: Includes the IOS/IOT/IOK Harness, clearly labeled pigtail harnesses for power, front speakers, rear speakers, and simple subwoofer installation.

Setup and Installation

Before beginning installation, ensure your vehicle's ignition is off and the battery is disconnected to prevent electrical damage. Refer to your vehicle's service manual for specific panel removal instructions.

Required Tools:

• Panel removal tools
• Wire strippers/crimpers
• Electrical tape or heat shrink tubing
• Multimeter (optional, for verification)

Installation Steps:

1. Access Vehicle Wiring: Carefully remove the necessary trim panels and the factory radio to gain access to the vehicle's wiring harness.
2. Disconnect Factory Harness: Disconnect the factory wiring harness from the back of the radio.
3. Connect T-Harness: Connect the PAC LPHGM72 T-Harness in-line with the factory wiring. One end of the T-Harness connects to the factory radio, and the other end connects to the vehicle's factory harness.
4. Identify Pigtail Harnesses: The LPHGM72 includes clearly labeled pigtail harnesses for various connections:
   • Power Extension
   • Front Speakers (Left and Right)
   • Rear Speakers (Left and Right)
   • Subwoofer (for simple subwoofer integration)
5. Connect Aftermarket Equipment: Connect the corresponding pigtail harnesses from the LPHGM72 to your aftermarket audio equipment (e.g., LOC-PRO Line Output Converters, Audiocontrol Amplifiers, Audiocontrol DSPs). Ensure all connections are secure and properly insulated.
6. Route Wiring: Carefully route all wiring to prevent pinching or interference.
7. Test System: Before reassembling the vehicle, reconnect the battery and test the functionality of your aftermarket audio system. Verify all speakers are working correctly and there are no abnormal noises.
8. Reassemble Vehicle: Once testing is complete and satisfactory, reassemble all removed panels and components.

Note: An optional 17' extension (LPHEXT17) is available for installations requiring further flexibility in component placement.

Operating Instructions

The PAC LPHGM72 T-Harness is an integration component and does not require direct user operation. Once installed, its function is to provide the necessary audio signals and connections for your aftermarket audio equipment to operate correctly with the vehicle's factory system.

Operation of your audio system will be controlled through your aftermarket head unit, amplifier, DSP, or other connected components, as per their respective instruction manuals.

Maintenance

The PAC LPHGM72 T-Harness is a passive electronic component and requires no routine maintenance. Ensure that all connections remain secure and free from moisture or physical damage.

• Periodically inspect visible wiring for signs of wear or damage.
• Keep the area around the harness free from debris or excessive heat.
• Do not attempt to modify the harness, as this may void any applicable warranty and could cause damage to your vehicle's electrical system.

Troubleshooting

If you experience issues after installing the PAC LPHGM72 T-Harness, consider the following troubleshooting steps:

• No Audio Output:
  • Verify all connections between the T-Harness, factory wiring, and aftermarket equipment are secure.
  • Check the power and ground connections to your aftermarket amplifier or DSP.
  • Ensure the aftermarket equipment is powered on and configured correctly.
  • Confirm the factory radio is functioning properly.
• Distorted Audio:
  • Check for loose or corroded connections.
  • Ensure proper gain staging on your amplifier or DSP to avoid clipping.
  • Verify speaker wiring polarity.
• Intermittent Audio:
  • Inspect all wiring for breaks or shorts.
  • Ensure connectors are fully seated.
• Vehicle Electrical Issues:
  • If vehicle warning lights appear or other electrical components malfunction, immediately disconnect the aftermarket system and consult a professional.

For further assistance, contact PAC technical support.

Specifications

Warranty and Support

For specific warranty information regarding the PAC LPHGM72 Integration T-Harness, please refer to the documentation provided with your purchase or visit the official PAC website. Warranty terms typically cover manufacturing defects.

For technical support, installation assistance, or troubleshooting beyond the scope of this manual, please contact PAC customer service directly. Contact information can usually be found on the manufacturer's website or product packaging.

Disclaimer: PAC is not responsible for damage caused by improper installation or modification of this product.