What Circuit Does Red Wire of Roadmaster Brake Lite Relay Attach to
Published 09/05/2019 >
Products Featured in This Question
Question:
Jameson, I asked the question the other day about which fuse socket to plug into on a F150 Raptor as the one identified in the video did not work locked out transmission. Just wanted you to know that I used the spot light socket yesterday and all worked fine. Just fyi.
asked by: Dean M
Expert Reply:
The reason the red wire of the Brake Lite Relay # RM-88400 runs to your fuse box is so that it can connect to a circuit that only sees power when the vehicle is on. This allows the relay to have power only when the vehicle is on. Obviously the circuit you are using now is not the correct once since the vehicle won't shift gears. Look for a different fuse circuit that would have power when the vehicle is on that would be less involved with the vehicle running like the "radio" fuse.
The only wire that gets connected to any of the vehicle taillights is the black wire that runs to the brake lights of the vehicle.
I attached an install video for this kit on a similar 2018 Ford F-150 for you to check out as well.
Product Page this Question was Asked From
Blue Ox Base Plate Kit - Removable Arms
- Tow Bar Base Plate
- Removable Draw Bars
- Twist Lock Attachment
- Completely Hidden
- Blue Ox
more information >
Featured Help Information
Instructions
Miscellaneous Media
Continue Researching
- Q&A: Plug and Play Flat Tow Wiring for 2018 Ford F-150
- Q&A: Blue Ox Base Plate and Tow Bar Fit for 2012 Ford F-150
- Article: Best Vehicles to Flat Tow Behind an RV
- Q&A: Can I Use a Blue Ox Patriot w/a Motorhome that has Air Brakes?
- Article: Roadmaster Vehicle Specific Base Plates
- Q&A: Does The Blue Ox Base Plate BLU33FR Fit 2024 Ford F-150 Raptor Ranch Model?
- Q&A: What is the Difference Between the Blue Ox Patriot BRK2019 & BRK2022?
- Article: Flat Towing Package for 2015-2018 Ford F-150
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Q&A: Parts Needed For Flat Towing 2016 Ford F150 4x4 Lariat
- Q&A: Recommended Flat Towing Parts for a 2026 Chevrolet Silverado 1500
- Article: Must-Have Flat Towing Components
- Article: The Definitive, Step-by-Step Flat Towing Setup Guide
- Article: Trailer Wiring Diagrams




Dean M.
9/5/2019
Jameson, I asked the question the other day about which fuse socket to plug into on a F150 Raptor as the one identified in the video did not work locked out transmission. Just wanted you to know that I used the spot light socket yesterday and all worked fine. Just fyi.