No Monitor Light on Roadmaster InvisiBrake Supplemental Braking System
Updated 11/22/2022 | Published 11/20/2022
Question:
The signal light in my coach is not lighting up when I brake. How can I be sure the system is worki
asked by: Terry B
Helpful Expert Reply:
I have attached for you below both a wiring diagram of the monitor light on the Roadmaster InvisiBrake Supplemental Braking System part # RM-8700 and troubleshooting steps from Roadmaster. If the light is not illuminating then you'll need someone to watch the brake pedal in the vehicle as you press the pedal in the motorhome to verify function.
- Make certain the brake light fuse was replaced in the towed vehicle.
- Make certain that the monitor wire patch cord between the two vehicles is securely connected.
- Make certain that there is an electrical ground between the motorhome and the towed vehicle.
- Check for power at the stop light switch, at the front of the vehicle and at the LED in the motorhome.
- Check for power at the back side of the LED light when the brake pedal is held down in the towed vehicle for approximately 20 seconds. You should hear an audible alert after 20 seconds which proves there is power to the harness just before the LED. If you hear the audible alert, verify proper power and ground connections at the LED light. You can also provide positive 12 volts and ground to the LED to determine if the LED has failed.
- The monitor LED is connected to the towed vehicle's brake light circuit. If the fuse in the circuit is blown, the LED will not operate. Check the towed vehicle's brake lights — if they illuminate when the brake pedal is depressed, the fuse is good.
- Was the optional Brake-Lite Relay installed? If so, make certain that the monitor wire is connected to the towed vehicle's brake light wire after the brake light switch, but before the Brake-Lite Relay — connecting the wire anywhere else will prevent the monitor LED from functioning.
(click to enlarge)
Product Page this Question was Asked From
Roadmaster InvisiBrake Flat Tow Brake System - Preset
- Flat Tow Brake System
- Brake Systems
- Pre-Set System
- One-Time Setup
- Vehicle Battery
- Fixed System
- Power Assist Brake Compatible
- Air Brakes
- Hydraulic Brakes
- Indicator Lights
- Roadmaster
more information >
Featured Help Information
Instructions
Continue Researching
- Search Results: roof vent covers
- Q&A: Wiring Diagram for Roadmaster InvisiBrake System on a 2021 Jeep Gladiator
- Video: 2021 Ford Ranger RoadMaster 6-Wire Trailer Connector: Complete Installation
- Q&A: Will My Portable Refrigerator Fit in the MORryde RV Slide Out Fridge Tray?
- Shop: Trailer Wiring
- Shop: RoadMaster 6-Wire Trailer Connector - Trailer End
- Shop: RoadMaster 6-Wire Trailer Connector - Vehicle End
- Shop: Vehicle Tow Bar Brake System
- Shop: Replacement Breakaway Switch for Roadmaster Flat Tow Brake Systems - Qty 1
- Shop: Roadmaster InvisiBrake Flat Tow Brake System - Preset
- Video: MORryde RV Fridge Tray Review
- Video: MORryde Reveals Their Smart Cord Storage Solution
- Video: An In-Depth Look at the MORryde Motorized Cord Storage Reel for 30' Long Power Cords
- Video: Roadmaster Diode Flexo-Coil Wiring Kit Light Test
- Shop: Vehicle Tow Bar Wiring
- Video: What to Know About the Replacement Breakaway Switch for Roadmaster Flat Tow Brake Systems
- Video: Roadmaster Replacement Breakaway Switch Installation - 2011 Chevrolet Avalanche
- Shop: Roadmaster Diode 7-Wire to 4-Wire Flexo-Coil Wiring Kit
- Shop: Rear View Safety Monitor Mount - Double Swivel Heads
- Shop: Kwikee SuperSlide I RV Cargo Slide Tray Assembly - 70" Long - 1,000 lbs
- Q&A: How to Test Brake Controller without Trailer Connected
- Shop: Trailer Hitch
- Search Results: trailer hitch
- Article: Trailer Wiring Diagrams
- Q&A: What is the Difference Between a Class II and a Class III Hitch?
- Q&A: Lug Nut Torque Chart for Trailer Wheels
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Search Results: trailer wiring
- Search Results: trailer tires and wheels
- Q&A: What is the Difference Between a 4-Way and 7-Way Trailer Connector
on Flat Tow Brake System
