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Third Brake Light Wiring Harness for a 2015 Ford F-150  

Updated 01/27/2026 | Published 08/17/2024

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Question:

Do you sell a wiring T connector for an 2015 f-150 so I can hook up a dome light and 3rd brake light for a leer truck canopy?

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Expert Reply:

David, we don't have any t-connector style harness to hook up a 3rd brake light, but we do have the 3rd Brake Light Logic Module # PP20-702.

This module when hooked up will filter out any unwanted turn signal input so that the light only activate when brakes are applied.

I've attached a wiring diagram for you to check out as well.

expert reply by:
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Bryce D
Third Brake Light Wiring Diagram
Third Brake Light Wiring Diagram
(click to enlarge)
Jesse M. profile picture
Etrailer Expert

Jesse M.

1/27/2026

Hey David, how did things go with the 3rd Brake Light Logic Module for your F-150 and Leer canopy? Your results could really help others trying to wire their dome or brake lights the same way.

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