Wiring Diagram For Roadmaster 4-Diode Universal Wiring Kit RM-15267

Updated 05/26/2026 | Published 07/13/2025

Question:

I need a wiring diagram for the RM-15267 wiring kit. I cant seem to find an accurate video on how to wire the passenger side lights. My kit did not include a wiring diagram.

asked by: Stuart

Expert Reply:

Hello Stuart, thanks for reaching out. I have provided a picture showing the wiring diagrams for the Roadmaster Diode Kit # RM-15267. I have also included a link to the manufacturer instructions, as well as a link to our video showing installation on a 2016 GMC Sierra 1500.

I hope this helps. Please let me know if you have any other questions.

expert reply by: Jesse M

RM-15267 Diagram
(click to enlarge)

Jesse M.

8/7/2025

Hey Stuart, how did the installation go with the wiring diagrams and video for the Roadmaster Diode Kit? I'm curious to know if it helped solve the issue with your passenger side lights. Let me know if there's anything else I can do to assist!

Jim C.

5/26/2026

Ive hat hid diode kit installed for about 4 years, have had constant problems with corrosion issues on diode itself. Replaced about a year ago. Now i have no running lights on right side of my Canyon, its intermittent take it a part from diode plug it back in seems to work for a while, the problem is not when vehicle being towed its when operating normal, which diagram would be the one i should go off of? 2021 Canyon is vehicle being towed,

Jesse M.

5/26/2026

@JimC The 2021 GMC Canyon uses combined tail light wiring, not separate, so you will want to follow the diagram on top for combined towed vehicle.