The Roadmaster InvisiBrake is a supplemental braking system designed for towed vehicles, offering automatic operation and integration with the motorhome’s braking system. It is designed to be a “set-it-and-forget-it” solution, requiring no manual activation once installed. The system includes a monitor for visual feedback and an emergency breakaway feature. It is compatible with a wide range of vehicles with vacuum-powered brakes, including hybrids and those with active braking systems. Installation requires careful planning due to the interdependence of component placement.
System Overview and Key Features
The InvisiBrake operates by applying the brakes of the towed vehicle in synchronization with the motorhome. A key feature is its automatic operation; once installed, the system activates whenever the motorhome’s brake lights are illuminated. This eliminates the need for manual engagement or disengagement. The system also provides a trickle charge to the towed vehicle’s battery during towing, preventing battery drain.
According to Roadmaster documentation, the InvisiBrake includes a two-stage motorhome monitor, providing both visual and audible alerts. The visual component is an LED monitor displaying braking activity. The audible alert warns the driver if the brakes have been engaged for an extended period. Braking pressure is adjustable, ranging from five to 100 psi, allowing for customization based on individual preferences. The system is designed to meet both U.S. and Canadian braking requirements.
Installation Process
Installation of the InvisiBrake requires careful planning due to the interdependent placement of its components – the controller, pulley, and air cylinder. Roadmaster provides detailed installation instructions, accessible through their website. The process begins with attaching the brake pedal clamp using 10-12 x 1 1/2” Allen head bolts and 10-24 Nylock nuts. A pulley is then attached, ensuring the cable runs in a straight line from the brake pedal for optimal function.
The installation may require drilling a hole in the towed vehicle’s firewall, although this is not universally necessary. If drilling is required, Roadmaster supplies a grommet and recommends using silicone sealant to maintain a watertight seal. Wiring harnesses are installed, and components are concealed to maintain a clean appearance. Following installation, the system undergoes testing to evaluate and adjust the brake pressure setting.
Component Details and Compatibility
The InvisiBrake system comprises several key components. These include the brake pedal clamp, the pulley, the air cylinder, the controller, and the motorhome monitor. Roadmaster offers various kits to accommodate different installation scenarios, including second vehicle kits (part numbers 98100 and 98160), second motorhome kits (part numbers 98850 and 98300), and new car kits (part 98700).
The system is designed to work with virtually any towed vehicle equipped with vacuum-powered brakes. This includes vehicles with hybrid systems and those featuring “active” or “continuous power assist” braking. Roadmaster provides a fit list to verify compatibility with specific vehicles. The InvisiBrake is also reported to work with Hydroboost braking systems, although specific details are available in a Technical Service Bulletin (TSIB).
Additional Accessories and Subcomponents
Roadmaster offers a range of accessories and subcomponents to complement the InvisiBrake system. These include the Brake-Lite Relay Kit (part 88400) and the Universal Wireless Brake Monitor (part 9530). Installation instructions are available for the 5/8" Brake Line Tee (part 452154-00) and the 1/4'' Check Valve. A Pulley Mounting Bracket Kit (part 8700-PB) is also available.
The system also includes an emergency breakaway system. Roadmaster provides wiring schematics for the InvisiBrake 8700 (available as a subcomponent document). Various Technical Service Bulletins (TSIBs) address specific installation concerns and compatibility issues, such as installation for Jeep Cherokees and push-button start vehicles.
Troubleshooting and Maintenance
Roadmaster provides troubleshooting resources for the InvisiBrake system. A TSIB addresses “No Problem Found” returns, assisting with diagnostic procedures. General troubleshooting guidance for braking systems is also available. The system is designed for minimal maintenance, operating automatically once installed. However, periodic inspection of the components and wiring is recommended to ensure proper function.
Discontinued Products and Legacy Support
Roadmaster has discontinued some braking systems, including the AddaBrake, BrakeMaster, and Even Brake. However, documentation and subcomponent information remain available for these legacy products. This includes installation instructions for various BrakeMaster models (9060, 9100, 9160) and Even Brake components. Tow dollies, such as the RM Tow Dolly (part 2000) and RM3477 (part 2050-1), also have associated documentation available, including assembly, wiring schematics, and owner’s manuals.
Safety Considerations
The InvisiBrake is designed to enhance safety when towing a vehicle. By providing supplemental braking, it reduces the strain on the motorhome’s braking system and helps maintain control. The system’s automatic operation eliminates the risk of forgetting to engage the brakes. The emergency breakaway system provides an additional layer of safety in the event of a disconnection between the motorhome and the towed vehicle. Proper installation and adherence to Roadmaster’s instructions are crucial for ensuring the system functions correctly and safely.
Conclusion
The Roadmaster InvisiBrake offers a convenient and effective solution for supplemental braking when towing a vehicle. Its automatic operation, adjustable braking pressure, and compatibility with a wide range of vehicles make it a popular choice among truck campers and RV enthusiasts. Careful installation, following the provided instructions and technical service bulletins, is essential for optimal performance and safety. The availability of supporting documentation and accessories further enhances the system’s usability and longevity.