Troubleshooting Brake Light Failures When Flat Towing A 2019 Buick Envision
Question:
Have a Roadmaster all terrain braking system for our tow carThe red brake lights after working for 2 years do not light up only the turn signal light when brake applied. Brake lights work on our RV ok we have a Monaco Cayman 2011. Our Buick is a 2019 envision. Thank you for your help.
asked by: Drew O
Expert Reply:
The Roadmaster Even Brake Portable Supplemental Braking System # RM-9400 wouldn't affect your brake lights in that manner. You most likely have a short or loose connection in the tow bar wiring which is causing the turn signal to work but not the brake light. You'll need to check all of the wiring running from the tail lights to the 4 or 6 wire port you have on the front of your 2019 Buick Envision for any shorts, kinks, or brakes in the wires or a complete disconnection of any wires. Your wiring was most likely run under your vehicle and could have been damaged by road debris or the connection to the tail light wiring or diode could have came loose. If you need new diodes or extra wire you can use the Roadmaster Universal Hy-Power Diode Wiring Kit # RM-152 to replace any damaged items.
Products Referenced in This Question
Roadmaster Universal Hy-Power Diode Wiring Kit
- Tow Bar Wiring
- Splices into Vehicle Wiring
- Diode Kit
- Universal
- Tail Light Mount
- Roadmaster
more information >
Product Page this Question was Asked From
Roadmaster Even Brake Portable Flat Tow Brake System - Proportional
- Tow Bar Braking Systems
- Brake Systems
- Proportional System
- Recurring Set-Up
- Portable System
- Not Power Assist Brake Compatible
- Air Brakes
- Air Over Hydraulic Brakes
- Hydraulic Brakes
- Roadmaster
more information >
Featured Help Information
Instructions
Miscellaneous Media
Continue Researching
- Article: Roadmaster Vehicle Specific Base Plates
- Article: Must-Have Flat Towing Components
- Q&A: Choosing Between the Brake Buddy Select 3 and the Blue Ox Patriot Supplemental Braking System
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Q&A: Can I Use A Tow Bar With The 2" Hitch On A 2006 Ford E350 Van?
- Q&A: Wiring For Lights When Dinghy Towing 2015 Kia Soul
- Q&A: Does the RoadMaster Blackhawk 2 All Terrain Tow Bar # RM-422 Include the Crossbar
- Article: Trailer Wiring Diagrams
- Q&A: Wiring Needed To Flat Tow A 2018 Ford F-150
- Article: We Used 34 RV Tow Bars, and These are the Best for Flat Towing
- Article: Tow Bar Wiring: Which Wiring Kit is for You?
- Article: How to Choose a High-Low Adapter
- Q&A: Recommended Flat Towing Set Up for a 2019 Chevy Colorado
- Q&A: Roadmaster Even Brake vs. Brake Buddy Select 3 Supplemental Braking Systems