PAC LPH Harness Instruction Guide
Important Notes
All LPH harnesses are designed to work on OEM Non-Amplified systems.
All LPH harnesses are designed to be modular and used in various applications:
- Adding Multi-Channel Amplifiers Front (LPH-SPK(A) / (C))
- Adding Multi-Channel Amplifiers Rear (LPH-SPK(B) / (D))
- Adding Multi-Channel Amplifiers Front / Rear (LPH-SPK(A) / (B) / (C) / (D))
- Adding Mono Amplifier Standalone Subwoofer (LPH-SPK(E))
- Provides Power/Ground/ACC (LPH-SPK(F))
- Provides speaker inputs / outputs on all channels
If no powered accessories are going to be installed behind your radio, you will not need to use the LPH-SPK(F) pigtail. If you are using this harness, ensure your loose ends are connected prior to plugging into the main LPH harness. If not connected to a device or insulated, this could cause a short circuit.
Wiring Connection Chart (All Models)
| LPH-SPK (A) | LPH-SPK (B) | LPH-SPK (C) | |||
|---|---|---|---|---|---|
| Front - Signal from AMP | Rear - Signal from AMP | Front - Signal to AMP | |||
| Wire Color | Function | Wire Color | Function | Wire Color | Function |
| White | Front Left (+) | Green | Rear Left (+) | White | Front Left (+) |
| White/Black | Front Left (-) | Green/Black | Rear Left (-) | White/Black | Front Left (-) |
| Gray | Front Right (+) | Violet | Rear Right (+) | Gray | Front Right (+) |
| Gray/Black | Front Right (-) | Violet/Black | Rear Right (-) | Gray/Black | Front Right (-) |
| LPH-SPK (D) | LPH-SPK (E) | LPH-SPK (F) | |||
|---|---|---|---|---|---|
| Rear - Signal to AMP | Signal to AMP (SUB-T) | Power Extension | |||
| Wire Color | Function | Wire Color | Function | Wire Color | Function |
| Green | Rear Left (+) | Blue | Left (+) | Yellow | Constant 12V |
| Green/Black | Rear Left (-) | Blue/Black | Left (-) | Red | Accessory |
| Violet | Rear Right (+) | Red | Right (+) | Black | Ground |
| Violet/Black | Rear Right (-) | Red/Black | Right (-) |
Note: LPH-SPK (E) can be used in both front or rear configurations based on user preference.
Note: Not all vehicles will provide accessory signal (Red Wire) via LPH-SPK (F).
Example Installation - Mono Amplifier - LPH-SPK(E)
For this application, split either the front or rear channels on the main LPH harness and insert LPH-SPK(E) in between. This provides a High-Level output for devices such as an Amplifier, DSP, or LOC that can accept a high-level input signal.
LPH-SPK(F) can be used to provide Power, Ground, and in some cases Accessory power for your audio adapter.
Test your vehicle's factory speaker signal to verify that low-level frequencies are present. This example also maintains your factory speaker connection as it is bypassed through the harness.
Example Installation - Multi-Channel Amplifier - LPH-SPK(A/B/C/D)
For this application, split either the front and/or rear channels on the main LPH harness and insert LPH-SPK(A-D) in between.
Harnesses LPH-SPK(C) and LPH-SPK (D) provide a High-Level output for devices such as an Amplifier, DSP, or LOC that can accept a high-level input signal.
Harnesses LPH-SPK(A) and LPH-SPK(B) allow you to run the output of your new aftermarket amplifier back through your factory wiring.
ANC vs Amplifier
Distinguishing Features:
- Amplifier: Larger, typically black, has 3 plugs.
- ANC Module: Smaller, typically silver, has 2 plugs.
Component Location Guides
2019+ RAM 1500
Location: Under Driver Seat
2019+ RAM 2500/3500
Location: Under Driver Dash
Jeep Cherokee
Location: Above glove box
Chrysler Pacifica
Location: Right of glove box / above passenger kick
2015-2016 Grand Cherokee
Location: Behind Right Quarter Trim Panel
