Brake Lights On Jeep Do Not Work While In Tow Mode
Question:
I just bought a diesel motorhome with air brakes with the 7-pin plug I have a demco one play duro brake controller in my jeep. I am not getting the brake lights on the jeep to light when pressing brake pedal. Is the Electric brake pin on the 7-pin plug used in towing the jeep or is it strictly for towing trailers with electric brakes? signal lights work fine, just not the brake lites. I am wondering if the air brakes make a difference. I did not have air brakes on my previous gas motorhome. Theres a fuse location for electric brakes on the fuse box, and it does not have a fuse in it at the moment. would I hurt anything to put a fuse in it and try the brakes? thanks
asked by: Hb C
Expert Reply:
The issue you are having with your brake lights will have more to do with the flat-tow wiring harness rather than the supplemental braking system. That said, the stop light switch circuit does go dead on certain Jeeps while in tow mode so the incorporation of a Roadmaster Stop Light Switch Kit is needed. If you can give me the year and model of your Jeep I can then confirm if this is the case and if so, what the correct part number is.
Also, the SMI Stay-IN-Play DUO Supplemental Braking System part # SM99251 which I think is what you are referring to is for motorhomes with hydraulic brakes. It will not work with motorhomes that have air brakes so you will want to use the SMI Air Force One Supplemental Braking System part # SM99243 instead.
I am not sure what fuse you are talking about but if the brake lights work while not in tow mode then this would not be the cause of this.
Products Referenced in This Question
Demco Air Force One Flat Tow Brake System for RVs w/ Air Brakes - Proportional
- Tow Bar Braking Systems
- Brake Systems
- Proportional System
- One Time Set-Up
- Fixed System
- Power Assist Brake Compatible
- Air Brakes
- Demco
more information >
Product Page this Question was Asked From
Demco Stay-IN-Play Duo Flat Tow Brake System for RVs w/ Hydraulic Brakes - Proportional
- Tow Bar Braking Systems
- Brake Systems
- Proportional System
- One Time Set-Up
- Fixed System
- Power Assist Brake Compatible
- Hydraulic Brakes
- Demco
more information >
Featured Help Information
Instructions
Continue Researching
- Shop: Vehicle Tow Bar Brake System
- Video: Roadmaster Stop Light Switch Kit Review
- Video: RoadMaster Stop Light Switch Kit Installation - 2022 Jeep Grand Cherokee WL - NEW body
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
- Shop: Vehicle Tow Bar Wiring
- Video: Blue Ox Patriot Flat Tow Brake System Second Vehicle Breakaway Kit Installation - 2020 Jeep Grand Ch
- Shop: Roadmaster Stop Light Switch Kit
- Shop: Trailer Wiring
- Video: Roadmaster Battery Charge Line Kit Review
- Video: Blue Ox Base Plate Kit Installation - 2022 Jeep Grand Cherokee L
- Q&A: What is the Difference Between 7-Way RV and Utility Trailer Connectors
- Shop: RoadMaster Stop Light Switch Kit
- Shop: Roadmaster Battery Charge Line Kit for Towed Vehicles
- Video: Hopkins Magnetic Tow Lights Review
- Q&A: Magnetic Tow Lights Dim with Multiple Signals
- Shop: 12 Volt Outlet Kit, 20 amps
- Shop: Heavy Duty Magnetic Tow Light Set - Incandescent - 30' Harness
- Q&A: How Long Does It Take To install A Blue Ox Bae Plate Kit On A 2021 Jeep Grand Cherokee L?
- Video: Best 2022 Jeep Grand Cherokee L Flat Tow Set Up - Tow Bar Wiring
- Shop: Hopkins Heavy-Duty, Coiled Trailer Connector Adapter - 7-Way to 6-Pole Round - Center Pin Brake
- Shop: Brake Buddy Select 3 Portable Flat Tow Brake System - Proportional
- Search Results: base plates
- Shop: Base Plate for Tow Bar
- Q&A: Choosing Between the Brake Buddy Select 3 and the Blue Ox Patriot Supplemental Braking System
- Article: Trailer Wiring Diagrams
- Search Results: base plate
- Q&A: All Parts Needed to Flat Tow 2014 Chevy Silverado 1500 Behind Motorhome
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Search Results: tow bar
- Article: Must-Have Flat Towing Components
on Tow Bar Braking Systems
