How Does Monitor of Roadmaster InivisiBrake Wire Up
Published 09/27/2019 >
Question:
My question was referring to the red power wire from the Invisi-Brake (page 2 of instructions for RM8700) that gets connected to a battery/power source. The power source I am referring to is the blue wire from the P2 (see attached). Yes, the included monitor will be installed.
asked by: Thierry S
Expert Reply:
On the motorhome side of the InvisiBrake install part # RM-8700 you would not want to use any of the wiring of your P2 brake controller part # 90885. The LED display of the monitor gets grounded and then actually draws power from the brake switch circuit of the toad vehicle like what you see in the attached wiring diagram.
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
- Video: Roadmaster InvisiBrake Flat Tow Brake System Install Guide - 2025 Ford Maverick
- Shop: Sikaflex 715 RV Roof Sealant - Semi Self-Leveling - White - 300 ml
- Shop: Vehicle Tow Bar Brake System
- Search Results: vehicle tow bar brake system
- Search Results: trailer brake controller
- Shop: Base Plate for Tow Bar
- Search Results: invisabrake
- Search Results: rm 8700
- Q&A: Wiring the Roadmaster InvisiBrake on a 2026 Ford Maverick
- Shop: Roadmaster InvisiBrake Flat Tow Brake System - Preset
- Video: Easily Install Your Roadmaster Battery Charge Line - 2026 Ford Maverick
- Video: How to Install the Roadmaster Direct-Connect Base Plate - 2026 Ford Maverick
- Shop: Vehicle Tow Bar Wiring
- Search Results: entry door
- Search Results: 18k ac
- Q&A: Will the Coleman-Mach Everest 18K BTU AC Work with the In-Command System on My Keystone?
- Search Results: freeze sensor
- Video: How to Install the Roadmaster 4-Diode Universal Wiring Kit - 2025 Ford Maverick
- Shop: Mach-C Everest Variable Speed RV Air Conditioner System - 18K Btu - Ducted/Non-Ducted - R32 - White
- Shop: Mach-C Everest Variable Speed RV Air Conditioner System - 18K Btu - Ducted/Non-Ducted - R32 - Black
- Shop: Coleman-Mach Mach-C Everest Thermostat
- Shop: Roadmaster 4-Diode Universal Wiring Kit for Towed Vehicles - 7-Way to 6-Way Coiled Adapter Cord
- Shop: Valterra Foam Weather Stripping for RV Air Conditioners - 14" x 14" Opening - 4-Piece
- Shop: Trailer Hitch
- Q&A: How Long Should the Installation of the Roadmaster InvisiBrake # RM-8700 Take
- Q&A: How To Install The Monitor Wire For The Roadmaster Invisibrake Supplemental Braking System
- Q&A: Braking Monitor/Alarm Kit Not Working When Installed On New RV Motorhome
- Q&A: Does Roadmaster InvisiBrake Require Trailer Brake Controller to Install
- Q&A: How To Wire In The Monitor Light For The Roadmaster InvisiBrake Supplemental Braking System
- Video: Checking Out the Roadmaster InvisiBrake Flat Tow Brake System



Thierry S.
9/27/2019
My question was referring to the red power wire from the Invisi-Brake (page 2 of instructions for RM8700) that gets connected to a battery/power source. The power source I am referring to is the blue wire from the P2 (see attached). Yes, the included monitor will be installed.