How to Wire the 3rd Brake Light Logic Module Using an RV 7-Way Trailer Connector
Updated 02/16/2021 | Published 02/11/2021
Products Featured in This Question
Question:
hello, I believe that the logic module that I got is defective. I wired it according to the diagram enclosed and it did not filter out the flash. I am using it with a 3rd brake light using a trailer plug. Your website offers this :How To Power Third Brake Light On Camper Shell Using 7-Way Trailer Connector Can you please send me a diagram? I have tried to wire it with every way I could, no way has worked. The answer is confusing feeds into output The module has 3 wires please could you providehow to wire diagram. or please explain what is the input, what is the output, do you wire in-line or splice into? with a splice, the light works in every way but still flashes. Using the directions in this answer, the light does not work at all. with clear directions it will be clear that there is no wiring mistake. then, if it still dose not work, I will know for sure if the part is in-fact defective. Thanks for your help
asked by: Marlene
Expert Reply:
I understand your frustration with wiring the 3rd Brake Light Logic Module, part # PP20-702. The wiring diagram provided is not very comprehensive. While we do not have another diagram to send, I can explain this in clearer terms.
The module is meant to receive the input from the left and right brake signals from the vehicle and filter them so that the turn signals do not show, leaving only the brake signal.
This is achieved by wiring the two yellow wires into the left and right turn signal functions on your vehicle, and wiring the green wire to the power of the new light.
If you are using the Pollak Black Plastic RV-Style Trailer Connector, part # PK12706, like in the question you referenced, then you will need to wire the two yellow wires of the module to the Left Turn and Stop and the Right Turn and Stop as labelled on the picture I have included (these are labelled with green and yellow lines in the diagram, but just know that it's the two yellow from the module that you'll using. Ignore the fact that green is chosen to represent the Right Turn and Stop in this particular diagram).
After wiring the two yellow wires into those points (it doesn't matter which goes to which, so long as one goes to Left and the other goes to Right), then you will wire the green wire of the module to the 12V source of the new light.
If you are not using a 7-way RV style trailer connector or if you're vehicle's harness is not a 7-way, let me know and I will explain further.
(click to enlarge)
Product Page this Question was Asked From
Featured Help Information
Instructions
Continue Researching
- Search Results: wheel chock holder
- Shop: 3rd Brake Light Logic Module
- Video: Complete Breakdown of the 3rd Brake Light Logic Module
- Shop: Vehicle Tow Bar Wiring
- Shop: Roadmaster Brite-Lite 3-to-2 Tail Light Converter for Towed Vehicles
- Shop: Curt Wheel Chock Set w/ Handles and Mounting Brackets - Solid Rubber - Qty 2
- Shop: etrailer Anti-Rattle Hitch Collar for 2" Hitch Receivers
- Video: Review of Westin Replacement LED Brake Light EXP Topper Truck Cap - W72PT
- Shop: Replacement LED Brake Light for Westin EXP Topper Truck Cap
- Shop: Pop & Lock Power Lock Conversion Kit for Truck Caps and Hard Tonneau Covers
- Search Results: bedslide truck bed slide
- Search Results: curt t~connector vehicle wiring harness
- Shop: Trailer Wiring
- Shop: Truck Bed Sliding Tray
- Q&A: How to Wire Third Brake Light on Trailer
- Q&A: How To Power Third Brake Light On Camper Shell Using 7-Way Trailer Connector
- Q&A: Can You Use The 3rd Brake Light Logic Module With A 4-Pole
- Q&A: Powering 3rd Brake Light and Dome Light on Topper for 2025 Silverado 1500
- Shop: Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector
- Q&A: How To Power Third Brake Light On Camper Using Trailer Connector
- Q&A: Making 7-Way to Camper Shell Third Brake Light Adapter
- Q&A: Wiring and Connectors to Power 2025 Ford Maverick Truck Cap 3rd Brake Light
- Video: An In-Depth Look at the Roadmaster Battery Charge Line Kit for Towed Vehicles
- Article: Trailer Wiring Diagrams
- Search Results: trailer hitch
- Shop: Trailer Hitch
- Video: An In-Depth Look at the Roadmaster Diode 7-Wire to 6-Wire Flexo-Coil Wiring Kit
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Search Results: trailer wiring
- Search Results: trailer tires and wheels
on Accessories and Parts
