Hayes 81770 Endeavor Digital Proportional Brake Controller Review

My Experience with the Hayes 81770 Endeavor Digital Proportional Brake Controller: Here’s the Truth

After years of towing various trailers, from utility haulers to my beloved vintage camper, I’ve learned that reliable braking isn’t just a convenience; it’s a non-negotiable safety feature. My latest rig, a gooseneck flatbed carrying a significant load, demanded a serious upgrade in trailer braking control. I needed something robust, intelligent, and capable of handling the demands of heavy-duty use. After some research, I settled on the Hayes 81770 Endeavor Digital Proportional Brake Controller.

The trigger for this upgrade was a particularly harrowing experience on a winding mountain pass where my old controller, a basic time-delay model, simply couldn’t keep up. The trailer pushed hard, making for a white-knuckle descent. I considered a few other proportional controllers, including some from established automotive brands, but the integrated diagnostics and the promise of smooth, intuitive braking offered by the Endeavor caught my eye.

Initial impressions upon unboxing were positive; the unit feels solid and well-constructed. The digital display is crisp and clear, and the overall aesthetic is professional, fitting neatly into my truck’s dashboard. There’s an immediate sense of confidence in its build quality, suggesting it’s designed to withstand the vibrations and rigors of frequent towing.

First Use Experience

My first real test of this proportional controller was on a familiar route, a mix of highway and some moderately hilly secondary roads, pulling a trailer loaded with landscaping equipment. The installation itself was straightforward, thanks to the Quik-Connect feature, which significantly simplified the wiring process compared to older, more complex installations I’ve encountered.

On the road, the difference was immediately apparent. The Hayes 81770 Endeavor Digital Proportional Brake Controller responded to deceleration with impressive smoothness. Unlike my old unit, there was no jarring engagement; it felt like the trailer was a natural extension of the truck, braking in sync. Adjusting the power output on the fly was simple, allowing me to fine-tune the braking force as conditions and the load’s behavior dictated.

The unit’s ability to display percent of power, voltage, or current was a revelation. I found myself primarily using the percent of power display during initial tuning, which gave me a clear, intuitive understanding of how much braking force was being applied. Later, I experimented with voltage to get a feel for the electrical output to the trailer brakes. No major issues arose during this initial period, just a steep learning curve to fully appreciate the proportional control.

Extended Use & Reliability

Over the past few months, the Endeavor has become an indispensable part of my towing setup, accumulating several thousand miles across varied terrain and weather conditions. From long highway stretches in the summer heat to damp, cool drives in the autumn, its performance has remained consistently strong and predictable. The unit has handled everything thrown at it without complaint.

Durability is a key factor for any piece of equipment I rely on, and this controller seems to be built to last. Despite the constant vibration from the road and occasional bumps on rough access roads, there are no signs of looseness, rattling, or performance degradation. The digital display remains clear and legible, even under direct sunlight, and the controls feel as responsive as they did on day one.

Maintenance has been practically non-existent. A quick wipe-down with a damp cloth is all that’s ever needed, and the solid-state design means there are no mechanical parts to wear out or require lubrication. Compared to older controllers I’ve used, which sometimes suffered from sluggish dials or intermittent connection issues, this Hayes unit is a significant step up in reliability and ease of ownership.

Breaking Down the Features of Hayes 81770 Endeavor Digital Proportional Brake Controller

Specifications

The Hayes 81770 Endeavor Digital Proportional Brake Controller is a digital inertia-based controller, meaning it uses an internal accelerometer to sense the tow vehicle’s rate of deceleration. This allows it to apply proportional braking, mimicking the pressure applied by the driver’s foot on the brake pedal. It features a Quik-Connect feature for easier installation and is 100% solid state for enhanced dependability and longevity.

This unit is capable of handling up to 4 axles, making it suitable for a wide range of trailer configurations, from smaller utility trailers to larger, multi-axle RVs or heavy-duty equipment haulers. A practical design choice is its ability to illuminate trailer lights when using manual braking, which is a crucial safety feature for visibility during manual activation. It is compatible with both electric and electric over hydraulic braking systems, offering broad application.

The digital display is a standout feature, allowing users to select and view information in terms of percent of power, voltage, or current. This level of detail provides flexibility and insight into the braking system’s operation. The controller also boasts a microprocessor that saves all your settings, meaning you don’t have to reconfigure it every time you start your truck. Power boost options are available, with selectable settings for 15%, 20%, and 25% power boost for initial trailer engagement.

Performance & Functionality

In terms of its primary function, the Hayes 81770 Endeavor Digital Proportional Brake Controller performs exceptionally well. The proportional braking is smooth and highly responsive, providing a sense of security and control that is absent in simpler time-delay units. During emergency stops, the trailer brakes engage with a force that feels appropriately matched to the tow vehicle’s deceleration, preventing trailer sway and maintaining stability.

The digital display is not just for show; it provides genuinely useful feedback. Being able to switch between percent of power, voltage, and current allows for different diagnostic approaches. I found the percent of power setting most intuitive for daily driving, providing a clear, real-time indicator of braking effort. The voltage readout was useful for verifying adequate power delivery to the trailer’s braking system.

A minor point of contention, though not a performance flaw, is the slight learning curve associated with mastering the power boost settings. While beneficial for certain situations, finding the optimal setting for different trailer loads and road conditions requires some experimentation. However, once set, the microprocessor saving your settings eliminates the need for constant readjustment.

Design & Ergonomics

The design of this brake controller is both functional and professional. The solid-state construction contributes to its perceived durability, and the digital display is a modern touch that enhances usability. The unit feels substantial and well-built, with no creaks or rattles, suggesting it can withstand the harsh environment of a vehicle’s dashboard.

Ergonomically, the controller is well-considered. The main adjustment knob is large enough to be easily manipulated, even with gloves on, and the buttons for accessing different display modes and settings are distinct and provide good tactile feedback. The Quik-Connect feature is a significant ergonomic win, simplifying the installation process considerably.

The fact that it illuminates trailer lights when using manual braking is a smart, practical design choice. This feature adds a layer of safety by ensuring that other drivers are aware of your vehicle’s presence and actions, particularly when braking manually on a steep grade or during slow maneuvering. The clean, uncluttered interface contributes to its ease of use.

Durability & Maintenance

Built with a 100% solid-state design, the Hayes Endeavor is inherently durable, with fewer moving parts prone to wear and tear. This means less potential for failure over the long term compared to older mechanical or analog controllers. The unit feels robust and capable of enduring years of service, even under heavy towing demands.

Maintenance is virtually non-existent. There are no complex mechanisms to clean or lubricate. The housing is easily wiped down, and the internal components are sealed and protected. This lack of required maintenance is a huge advantage for anyone who wants a reliable piece of equipment without the hassle.

Potential failure points are minimal due to the solid-state nature. The primary concerns would likely be related to electrical connections or the digital display itself, but in my experience, it has held up exceptionally well. For a device that will see constant use and vibration, its current resilience suggests a long service life.

Accessories and Customization Options

The Hayes 81770 Endeavor Digital Proportional Brake Controller comes with the essential components for installation, including wiring harnesses designed for its Quik-Connect feature. While it doesn’t come with a vast array of accessories, the core functionality is comprehensive.

The primary customization comes through its digital display settings and power boost options. Being able to select percent of power, voltage, or current offers a unique level of user control and diagnostic capability. The adjustable power boost settings (15%, 20%, and 25%) allow for tailoring the initial braking response to specific towing needs.

While there are no external customization options like interchangeable faceplates or optional displays, the internal programmability and feature set are robust enough for most towing scenarios. Its compatibility with electric and electric over hydraulic braking systems also makes it a versatile choice, avoiding the need for separate controllers for different trailer types.

Pros and Cons of Hayes 81770 Endeavor Digital Proportional Brake Controller

Who Should Buy Hayes 81770 Endeavor Digital Proportional Brake Controller?

This controller is ideal for any serious tower who values safety, performance, and advanced control over their trailer brakes. It’s a perfect fit for owners of RVs, fifth-wheels, heavy-duty equipment haulers, or any trailer setup with 2 to 4 axles. If you frequently tow in varied terrain, encounter steep grades, or simply want the most predictable and integrated braking experience, this unit is an excellent choice.

Individuals looking to upgrade from a basic time-delay controller will find a significant improvement in braking feel and control. Furthermore, DIY mechanics or those comfortable with basic automotive wiring will appreciate the Quik-Connect feature which simplifies the installation process. Those who appreciate detailed diagnostics and the ability to monitor their braking system’s performance will also benefit greatly from the digital display options.

Anyone seeking a simple, plug-and-play solution for a single-axle trailer might find this unit overkill and perhaps too expensive. Similarly, if you prefer purely analog controls or find digital displays distracting, this might not be the best fit. For those whose towing needs are minimal and primarily flat, a less sophisticated controller might suffice.

Conclusion on Hayes 81770 Endeavor Digital Proportional Brake Controller

The Hayes 81770 Endeavor Digital Proportional Brake Controller is, without question, a top-tier braking control system. Its digital proportional braking, coupled with the versatile digital display and convenient setting memory, provides an unparalleled level of control and confidence for any towing situation. The solid-state construction and Quik-Connect feature further enhance its appeal, offering both reliability and ease of installation.

While its price point is higher than basic models, the performance, safety enhancements, and advanced features justify the investment. For anyone who regularly tows significant loads or values the utmost in braking safety and responsiveness, this unit is a worthwhile upgrade. I can confidently recommend the Endeavor to anyone looking for a premium, dependable trailer brake controller that truly delivers.