Tutorial for Installing the LPH T-Harnesses

The LPH T-harness allows you to install aftermarket amplifiers without modifying the factory harness. The LPH T-Harness is intended for use with a line output converter (LOC), but can also be connected directly to an aftermarket amplifier if it accepts a high-level signal. It is important to verify that the vehicle is not equipped with a factory-installed amplifier.

Installing a subwoofer amplifier:

For this tutorial, we will be using the Audio Control LC2i PRO.

1. Unplug the connector with the Green and Purple wires.

   Note: For this tutorial, rear speakers (green & purple) are used. Some vehicles' rear speakers are high-pass filtered and lack bass. Before installation, check which speakers have the most bass and use those for the best results. If the front speakers (gray & white) have more bass, use those instead.

2. Connect the harness labeled Signal To Amp (SUB-T) to both the female and male connectors on the LPH T-Harness.
3. The red and blue wires will connect to the input on the LC2i PRO labeled Speaker Inputs.
   • Red: Right +
   • Red/Black: Right -
   • Blue: Left +
   • Blue/Black: Left -
4. Connect the 3-pin harness labeled Power Extension.
   • Connect the Black wire to the ground terminal on the LC2i PRO.
   • Connect the Yellow wire to the 12V battery terminal on the LC2i PRO.
   • Tape off and disregard the Red wire.

Note: Example layout at the bottom of the page.

Installing a 4-channel amplifier:

For this tutorial, we will be using the Audio Control LC5i PRO. The LC5i PRO is perfect for this application because it accepts 4 channels of input and has load resistors built-in which many vehicles require.

Tip: Use the LPHEXT17 extension harness for easy installation. It offers 17' of wire for the LOC and amplifier, with connectors that plug into the LPH harness.

Front Channels

• Unplug the connector with the Gray and White wires.

From Radio

1. Connect the 4-pin male harness labeled Front Signal To Amp to the LPH T-Harness.
2. The loose wires will connect to the inputs on the LC5i PRO labeled Channel 1 inputs. This input is designated as a front input.-
   • Gray: Right +
   • Gray/Black: Right -
   • White: Left +
   • White/Black: Left -

To Speakers

1. Connect the 4-pin male harness labeled Front-Signal From Amp to the LPH T-Harness.
2. The loose wires will connect to the speaker outputs on the aftermarket amplifier. This output is designated as a front speaker output.
   • Gray: Right +
   • Gray/Black: Right -
   • White: Left +
   • White/Black: Left -

Rear Channels

• Unplug the connector with the Green and Purple wires.

From Radio

1. Connect the 4-pin male harness labeled Rear Signal To Amp to the LPH T-Harness.
2. The loose wires will connect to the inputs on the LC5i PRO labeled Channel 2 inputs. This input is designated as a rear input.
   • Purple: Right +
   • Purple/Black: Right -
   • Green: Left +
   • Green/Black: Left -

To Speakers

1. Connect the 4-pin male harness labeled Rear-Signal From Amp to the LPH T-Harness.
2. The loose wires will connect to the speaker outputs on the aftermarket amplifier. This output is designated as a rear speaker output.
   1. Purple: Right +
   2. Purple/Black: Right -
   3. Green: Left +
   4. Green/Black: Left -

Power Connections

1. Connect the 3-pin harness labeled Power Extension.
   • Connect the Black wire to the ground terminal on the LC5i PRO.
   • Connect the Yellow wire to the 12V battery terminal on the LC5i PRO.
   • Tape off and disregard the Red wire.

Note: Example layout at the bottom of the page.

Example Layouts:

Subwoofer Amplifier Example Layout:

4 Channel Amplifier Example Layout:

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