Hopkins Trailer Brake Controllers: The Ultimate Power Boost for Safe Towing

Hopkins trailer brake controllers offer precise control and reliable stopping power for your trailer. With a variety of models to choose from, hopkins provides the perfect brake controller solution for any towing need.

Whether you’re hauling a boat, rv, or utility trailer, hopkins trailer brake controllers deliver the safety and peace of mind you need on the road. Experience smooth and efficient braking with hopkins trailer brake controllers.

Hopkins Trailer Brake Controllers: The Ultimate Power Boost for Safe Towing

Credit: www.etrailer.com

Table of Contents

What Are Hopkins Trailer Brake Controllers?

Definition And Functionality Of Trailer Brake Controllers

Trailer brake controllers are essential components in towing systems that help control the brakes on a trailer. These devices ensure safe and smooth braking by synchronizing the braking action between the towing vehicle and the trailer. Hopkins trailer brake controllers, specifically, are renowned for their reliable performance and advanced features.

Here’s what you need to know about the definition and functionality of hopkins trailer brake controllers:

Hopkins trailer brake controllers are electronic devices that are specifically designed to regulate the brakes on a trailer.
These controllers work by sending signals from the towing vehicle to the trailer’s brakes, allowing the driver to control the trailer’s braking intensity.
The functionality of hopkins trailer brake controllers is based on a proportional braking system, which means that the braking force increases or decreases based on the deceleration of the towing vehicle.
The controllers use a sensor to detect the deceleration of the towing vehicle and adjust the trailer’s brakes accordingly, ensuring smooth and synchronized braking.
Hopkins trailer brake controllers are compatible with a variety of trailer types, including utility trailers, horse trailers, and boat trailers.

How Hopkins Trailer Brake Controllers Differ From Other Options

While there are various trailer brake controller options available in the market, hopkins trailer brake controllers stand out for several reasons. Here’s why they differ from other options:

Reliable performance: Hopkins has a solid reputation for producing high-quality brake controllers that offer consistent and reliable performance. This reliability ensures peace of mind for users.
Advanced technology: Hopkins trailer brake controllers incorporate advanced technology, such as intelligent braking algorithms and built-in diagnostics, to enhance their functionality and provide a superior towing experience.
Easy installation: Hopkins controllers are designed with user convenience in mind. They are relatively easy to install, allowing users to get their brake controllers up and running quickly and efficiently.
Compatibility: Hopkins trailer brake controllers are compatible with a wide range of trailer types and towing vehicles, making them a versatile choice for various towing applications.
Durability: Built to withstand the demands of heavy-duty towing, hopkins controllers are known for their durability and long-term reliability.

Benefits Of Using Hopkins Trailer Brake Controllers

Investing in hopkins trailer brake controllers offers numerous benefits to trailer owners. Let’s explore some of these advantages:

Enhanced safety: With hopkins trailer brake controllers, you can ensure safer towing experiences. The proportional braking system synchronizes the trailer’s brakes with the towing vehicle, reducing the risk of jackknifing and providing better control during sudden stops or emergency situations.
Smoother braking: These controllers enable smoother and more controlled braking, minimizing jerking or surging experienced when towing heavy loads. This not only enhances safety but also improves the overall towing experience.
Improved brake life: Hopkins trailer brake controllers help extend the life of your trailer’s brakes by distributing the braking force evenly. This prevents premature wear and tear, ultimately saving you money on brake replacements.
User-friendly operation: Hopkins controllers are designed to be user-friendly, with intuitive interfaces and controls. This makes it easier for drivers to adjust the braking intensity according to their preferences and towing needs.
Compliance with towing regulations: Using hopkins trailer brake controllers ensures compliance with towing regulations, which often require the use of functional and efficient brake control systems.

Hopkins trailer brake controllers provide an effective solution for controlling the brakes on trailers. Their cutting-edge technology, reliability, compatibility, and numerous benefits make them a popular choice among trailer owners and towing enthusiasts. So, if you’re looking for a top-notch trailer brake controller, hopkins should be at the top of your list.

Understanding The Ultimate Power Boost

How Hopkins Trailer Brake Controllers Provide Power Boost For Safe Towing

Hopkins trailer brake controllers offer an ultimate power boost while towing, ensuring safe and efficient braking for your trailer. With advanced features and user-friendly design, these brake controllers provide the power necessary to control your trailer’s brakes effectively. Let’s dive deeper into the importance of power boost and the features that make hopkins trailer brake controllers stand out.

Importance Of Power Boost In Controlling Trailer Brakes

Controlling the brakes of a trailer is crucial for safe towing. The power boost feature in hopkins trailer brake controllers plays a vital role in achieving this control by:

Amplifying the power signal from your vehicle’s brake pedal to the trailer’s braking system.
Enhancing the brake controller’s ability to activate the trailer brakes, especially in demanding situations like steep descents or sudden stops.
Improving overall brake response, allowing you to maintain better control over your trailer and reduce the risk of accidents.

Features Of Hopkins Trailer Brake Controllers That Enhance Power Boost

Hopkins trailer brake controllers offer a range of features that enhance the power boost capability, ensuring optimal performance and safety while towing. These key features include:

Brake boost levels: Hopkins controllers provide multiple brake boost levels, allowing you to customize the amount of power sent to the trailer brakes based on your towing needs. This flexibility ensures precise control and improved safety.
Advanced brake time settings: With adjustable brake time settings, you can fine-tune the response time of the trailer brakes, providing smooth and effective braking. This feature eliminates the risk of sudden jerks or lurching stops.
Easy-to-read led displays: Hopkins controllers are equipped with clear led displays, enabling you to monitor and adjust settings easily while on the go. This user-friendly interface ensures convenience and minimizes distractions, improving overall safety.
Plug-and-play installation: Designed for hassle-free installation, hopkins trailer brake controllers offer a plug-and-play setup, compatible with most vehicles. This saves time and effort, allowing you to get on the road quickly.
Short circuit protection: Hopkins controllers come with built-in short circuit protection, safeguarding both your vehicle and trailer electrical systems. This additional safety measure ensures peace of mind during your towing journeys.
Compact and durable design: The compact size of hopkins trailer brake controllers makes them easy to mount and fit into any vehicle’s interior. Crafted with durability in mind, they can withstand the rigors of frequent towing, providing long-lasting reliability.

By incorporating these features into their brake controllers, hopkins ensures that you have the necessary power boost to safely and effectively control your trailer’s brakes in various towing scenarios.

Now that we understand the importance of power boost and the features that contribute to its effectiveness, it’s clear why hopkins trailer brake controllers are an ideal choice for towing enthusiasts seeking reliable braking performance. Ensure a safe and smooth towing experience by harnessing the ultimate power boost offered by hopkins trailer brake controllers.

Choosing The Right Hopkins Trailer Brake Controller

Factors To Consider When Selecting A Hopkins Trailer Brake Controller

When it comes to choosing the right hopkins trailer brake controller for your towing needs, there are several factors to consider. From the different models and their features to the compatibility with various towing setups, here are the key points to keep in mind:

Trailer weight: Consider the weight of your trailer and ensure that the brake controller you choose is suitable for your towing needs. Different hopkins models may have varying weight capacities, so it’s important to select one that can handle the load you intend to tow.
Trailer brake system: Identify the type of braking system your trailer uses, as it will affect the compatibility with the brake controller. Hopkins offers models that are compatible with both electric and hydraulic brake systems, ensuring that you can find the right controller for your setup.
Towing vehicle specifications: Take into account the specifications of your towing vehicle, such as the type of connector it uses to interface with the trailer brake controller. Hopkins provides options for both 2-plug and 4-plug connectors, enabling seamless integration with your vehicle’s electrical system.
User interface: Consider the design and user interface of the brake controller. Look for features like easy-to-read displays, intuitive controls, and clear indicators for braking status. A user-friendly interface can make operating the brake controller a breeze, enhancing your overall towing experience.
Proportional vs. time-delayed braking: Decide whether you prefer a proportional or time-delayed braking system. Proportional brake controllers provide braking force based on the deceleration of your towing vehicle, offering a smoother and more controlled braking experience. Time-delayed controllers, on the other hand, apply a preset amount of braking force after a specified delay.

Different Models And Their Features

Hopkins offers a range of trailer brake controller models, each with its own set of features. Here are some key models and their notable features:

Hopkins insight: This model features a digital display with adjustable color and contrast, making it easy to monitor braking information at a glance. It also offers multiple language options, allowing users to select their preferred language for the interface.
Hopkins impulse: The impulse controller boasts a compact design and a simple rotary knob for manual braking control. It also provides overload and short-circuit protection, ensuring the safety and longevity of your brake controller.
Hopkins agility: Designed for trailers with 4 to 6 brakes, the agility controller offers straightforward installation with its plug-and-play design. It features automatic leveling, providing consistent braking performance even on varying terrains.
Hopkins reliance: The reliance model is known for its rugged construction and wide range of voltage compatibility. It can handle voltages from 12v to 24v, making it suitable for various towing vehicle setups.

Compatibility With Various Towing Setups

Hopkins trailer brake controllers are designed to be compatible with a wide range of towing setups. Here are some important points to consider in terms of compatibility:

Electric and hydraulic brake compatibility: Hopkins offers brake controllers that are compatible with both electric and hydraulic brake systems. This ensures that you can find a suitable option for your specific trailer brake setup.
Connector compatibility: Depending on your towing vehicle, you may require a brake controller with a 2-plug or 4-plug connector. Hopkins provides options for both types, allowing for seamless integration between your vehicle and the brake controller.
Wiring harness compatibility: Hopkins also offers a variety of wiring harness options, making it easier to connect the brake controller to your vehicle’s electrical system. Ensure that you choose a harness that is compatible with your vehicle’s wiring setup for optimal functionality.
Towing vehicle compatibility: Consider the specifications of your towing vehicle, such as its braking capabilities and electrical system. Ensure that the hopkins brake controller you select is compatible with your vehicle’s towing setup to ensure proper functionality and safety.

When selecting a hopkins trailer brake controller, consider factors such as trailer weight, brake system compatibility, towing vehicle specifications, user interface, and the choice between proportional and time-delayed braking. Additionally, explore the features offered by different hopkins models and ensure compatibility with your specific towing setup for an enhanced towing experience.

Installation Process For Hopkins Trailer Brake Controllers

Step-By-Step Guide To Installing Hopkins Trailer Brake Controllers

Installing hopkins trailer brake controllers is a straightforward process that can be completed with a few basic tools and some careful attention to detail. Here is a step-by-step guide to help you through the installation:

Prepare the tools: Before you begin the installation process, make sure you have the necessary tools on hand. You will need a screwdriver, wire strippers, electrical tape, and zip ties.
Locate the brake control unit: The first step is to locate the brake control unit in your vehicle. This unit is typically found under the dashboard on the driver’s side. Take a moment to familiarize yourself with its placement before proceeding.
Disconnect the negative battery terminal: To ensure safety during the installation process, it is essential to disconnect the negative battery terminal. This will prevent any electrical shock or accidental damage.
Mount the brake control unit: Using the provided mounting bracket, secure the brake control unit in a convenient location under the dashboard. Make sure the unit is easily accessible and does not obstruct any other vehicle controls.
Connect the brake control unit to the vehicle’s power source: Locate the vehicle’s power source wire, often found near or behind the brake pedal. Connect one end of the wire to the power terminal on the brake control unit. Use wire strippers to expose a small section of the wire and attach it securely.
Connect the brake control unit to the trailer: Attach the blue wire on the brake control unit to the trailer’s brake wire. This connection allows the brake control unit to communicate with the trailer’s braking system. Use wire strippers to expose a small section of the wire and attach it securely.
Connect the brake control unit to the vehicle’s brake light switch: Locate the vehicle’s brake light switch wire, usually found near the brake pedal. Connect one end of the wire to the brake light switch wire on the brake control unit. Use wire strippers to expose a small section of the wire and attach it securely.
Test the brake control unit: Once all the connections have been made, reconnect the negative battery terminal. Test the brake control unit by engaging the brake pedal and ensuring that the trailer’s brakes are activated. Make any necessary adjustments to the brake control unit’s settings to achieve the desired braking performance.
Secure and organize the wiring: Once you have confirmed that the brake control unit is functioning correctly, secure and organize the wiring using zip ties and electrical tape. This will help prevent any loose wires or potential hazards.

Tools Required For Installation

To install hopkins trailer brake controllers, you will need the following tools:

Screwdriver: Used to secure the brake control unit in place.
Wire strippers: Essential for exposing a small section of wire for proper connections.
Electrical tape: Helps to secure and insulate wire connections.
Zip ties: Used to secure and organize wiring.

Common Challenges And How To Overcome Them

While installing hopkins trailer brake controllers is a relatively straightforward process, you may encounter a few common challenges along the way. Here are some tips to help you overcome them:

Incorrect wire connections: Double-check your wire connections to ensure they are properly attached and secure. Loose connections can result in faulty braking performance.
Inadequate grounding: Ensure that the brake control unit has a solid ground connection. A poor ground can cause erratic brake control operation.
Compatibility issues: Verify that the hopkins trailer brake controller you are installing is compatible with both your vehicle and your trailer. Consult the product manual or reach out to a professional if you are uncertain.
Adjustment difficulties: If you are experiencing issues with your brakes not engaging or engaging too aggressively, make sure to adjust the brake control unit’s settings according to the manufacturer’s instructions.

By following these steps and keeping these common challenges in mind, you will be well-equipped to successfully install hopkins trailer brake controllers in your vehicle. Enjoy a safer and more controlled towing experience with this essential braking system.

Fine-Tuning And Adjustments For Optimal Performance

Importance Of Fine-Tuning Brake Controller Settings

Properly adjusting the settings on your hopkins trailer brake controller is crucial for achieving optimal performance and safety while towing. Fine-tuning the brake controller settings allows you to personalize the braking system according to your specific towing needs. Here are a few reasons why it is important to pay attention to these settings:

Tailored braking response: Adjusting the gain setting ensures that the trailer brakes engage with the right amount of force when you apply the brakes in your vehicle. This helps prevent the trailer from pushing or pulling your vehicle during sudden stops or downhill descents.
Enhanced braking control: Fine-tuning the sensitivity setting determines how quickly the trailer brakes respond when you apply the brakes. Finding the right sensitivity level allows for more precise braking control and reduces the risk of trailer sway.
Improved safety: Accurate adjustments to the output power setting prevent the trailer brakes from overpowering or underperforming, which can lead to unsafe towing conditions. Properly calibrated brake controller settings contribute to a smoother and safer towing experience.

How To Adjust Gain, Sensitivity, And Other Settings

Adjusting the gain, sensitivity, and other settings on your hopkins trailer brake controller is a straightforward process. Here’s a step-by-step guide to help you:

Mount the brake controller: Follow the manufacturer’s instructions to mount the brake controller in a suitable location within reach while you are towing.
Connect the wiring: Ensure that the brake controller is correctly wired and connected to the electrical system of your towing vehicle.
Set the gain: Start by setting the gain to its lowest level. Then, take a test drive and gradually increase the gain until you achieve the desired braking response. Keep in mind that the gain may need adjustment based on the trailer’s weight and load.
Adjust the sensitivity: Experiment with the sensitivity setting by testing its effect on the responsiveness of the trailer brakes. Start with the default setting and make any necessary adjustments to achieve optimal control without causing excessive braking.
Fine-tune other settings: Some hopkins brake controllers offer additional settings such as boost, which provides extra braking power under heavy loads. Consult the product manual to understand these settings and make appropriate adjustments if needed.

Tips for achieving optimal performance and safety:

Regularly check and maintain your brake controller to ensure that it is functioning properly.
Perform test stops in a safe environment to evaluate the braking performance and make any necessary adjustments.
Consider the weight distribution and load balance of your trailer to determine the most effective brake controller settings.
Seek professional assistance or consult the manufacturer’s customer support if you have any doubts or questions regarding the adjustment process.
Remember that the brake controller settings may need periodic reevaluation and fine-tuning to accommodate different towing conditions or changes in trailer weight.

By taking the time to fine-tune and adjust the settings on your hopkins trailer brake controller, you can optimize your towing experience for both performance and safety. These adjustments allow for personalized braking control based on your specific needs, ultimately enhancing the overall towing experience.

Ensuring Safety With Hopkins Trailer Brake Controllers

Importance Of Regular Maintenance And Inspection

Regular maintenance and inspection of hopkins trailer brake controllers is crucial to ensure the safety and efficiency of your trailer braking system. By adhering to a maintenance routine, you can identify and address any issues promptly, avoiding potential accidents on the road.

Here are some key points to consider:

Regular maintenance and inspection aids in detecting any wear and tear or malfunctioning components in the brake controller.
It helps prevent brake failure and promotes the longevity of the braking system.
Routine maintenance ensures that the trailer brake controller is in optimal condition, providing reliable braking performance.
Regular inspections allow you to identify and rectify any wiring or electrical issues that may impede the functionality of the brake controller.
Maintenance also gives you an opportunity to clean and lubricate the controller’s moving parts, ensuring smooth operation.

Common Issues With Trailer Brake Controllers And How To Troubleshoot

While hopkins trailer brake controllers are known for their reliability, it’s essential to be aware of common issues that may arise and know how to troubleshoot them. Here are some key points and troubleshooting tips to keep in mind:

Inconsistent braking power: If your trailer brakes apply with varying intensities, first check the brake controller’s settings to ensure it is properly calibrated. Additionally, inspect the electrical connections and ensure they are secure. Adjust the braking force as necessary.
Brake controller not responsive: If your brake controller fails to respond or does not activate the trailer’s brakes, check the fuse connected to the controller. A blown fuse can disrupt the functionality. Replace the fuse if necessary.
Error codes or warning lights: If you encounter error codes or warning lights on your brake controller, refer to the manufacturer’s manual for specific troubleshooting steps. Resetting the controller or performing a system reset may resolve the issue.
Wiring issues: Examine the wiring connections between the brake controller and your vehicle. Loose or damaged wiring can impact the performance of the brake controller. Secure any loose connections and repair or replace damaged wiring as required.

Safety Precautions When Using Hopkins Trailer Brake Controllers

Ensuring utmost safety when using hopkins trailer brake controllers is paramount to a hassle-free towing experience. By following these safety precautions, you minimize the risk of accidents and promote the well-being of yourself and others on the road. Here are some important points to remember:

Familiarize yourself with the manufacturer’s instructions and guidelines for operating the trailer brake controller.
Prior to every towing trip, visually inspect the brake controller and the trailer braking system for any visible damage or signs of wear.
Test the functionality of the brake controller and brakes before embarking on a journey. Ensure the brakes respond appropriately and provide adequate stopping power.
Regularly verify that the brake controller is properly adjusted and calibrated for the specific load you are towing.
Adhere to recommended speed limits and maintain a safe following distance, allowing ample time for the trailer brakes to bring the vehicle to a stop.
Regularly check the brake fluid level in the master cylinder to ensure optimal braking performance.
If you observe any abnormal behavior, such as unusual braking patterns or strange noises, promptly investigate and address the issue before continuing to use the trailer brake controller.

Remember, prioritizing safety and performing regular maintenance and inspections on your hopkins trailer brake controller is essential for trouble-free towing experiences and a safer journey on the road.

Faqs About Hopkins Trailer Brake Controllers

Hopkins trailer brake controllers are essential for safe and efficient towing. If you’re new to using these brake controllers, you may have some questions. Here are some frequently asked questions and their answers to help you understand more about hopkins trailer brake controllers.

How do hopkins trailer brake controllers work?

Hopkins trailer brake controllers are designed to apply the brakes on your trailer in proportion to the braking force applied to your vehicle. It measures the deceleration of your vehicle and the brake pedal pressure to determine the right amount of braking power for your trailer.

Can i install hopkins trailer brake controllers myself?

Yes, hopkins trailer brake controllers are generally easy to install and come with detailed instructions. However, it is recommended to have a basic understanding of your vehicle’s electrical system and consult your vehicle’s owner’s manual for specific instructions.

What type of brake controller do i need for my trailer?

The type of brake controller you need depends on the trailer’s braking system and the towing capacity of your vehicle. Hopkins offers a range of brake controllers suited for various trailer types and sizes. It is important to match the brake controller’s capacity with your trailer’s weight and braking system.

Do i need a brake controller for my trailer?

If your trailer weighs more than 1,500 pounds, most states require you to have a functional brake controller installed. It ensures safe stopping distances and prevents excessive wear on your vehicle’s brakes.

Can hopkins trailer brake controllers be used with any vehicle?

Hopkins trailer brake controllers are designed to work with a wide range of vehicles, including cars, trucks, and suvs. However, it is important to check the compatibility of the brake controller with your specific vehicle’s electrical system before making a purchase.

How do i adjust the braking intensity with hopkins trailer brake controllers?

Hopkins trailer brake controllers typically have a manual override control and an adjustment knob for brake intensity. You can adjust the intensity based on your trailer’s weight and braking behavior. It is recommended to start with a lower intensity and gradually increase it until you achieve optimal braking performance.

Troubleshooting Tips For Common Issues

While hopkins trailer brake controllers are known for their reliability, you may encounter some issues during their usage. Here are some troubleshooting tips for common issues:

Brake controller not working at all:
Ensure the brake controller is properly connected to your vehicle’s electrical system.
Check the fuse and wiring connections for any damage or loose connections.
Consult the brake controller’s manual for specific troubleshooting steps.
Brakes grabbing or locking up:
Reduce the brake controller’s intensity setting to prevent excessive braking force.
Check the brake controller’s ground connection for any loose or corroded wires.
Check the condition of your trailer’s brakes and adjust or replace them if necessary.
No power to the trailer brakes:
Check the vehicle’s electrical connections to ensure they are securely attached.
Inspect the trailer’s wiring harness for any damage or loose connections.
Test the brake controller with a different trailer to determine if the issue is with the trailer or the brake controller.

Additional Resources For Further Information

If you still have questions or need more information about hopkins trailer brake controllers, the following resources can help:

Hopkins manufacturing website: Visit the official hopkins manufacturing website for detailed product information, installation guides, and faqs.
Online forums and communities: Join online forums and communities dedicated to towing and trailer brakes to connect with experienced users who can offer advice and insights.
Vehicle manufacturer’s website: Check your vehicle manufacturer’s website for any specific recommendations or guidelines related to trailer brake controllers.
Local trailer and towing equipment shops: Consult with experts at your local trailer and towing equipment shops who can provide personalized assistance and recommendations based on your specific needs.

Frequently Asked Questions On Hopkins Trailer Brake Controllers

How Do Hopkins Trailer Brake Controllers Work?

Hopkins trailer brake controllers work by applying and releasing the brakes on the trailer to help it stop smoothly and safely when the tow vehicle’s brakes are applied.

Why Do I Need A Hopkins Trailer Brake Controller?

A hopkins trailer brake controller is necessary to ensure that your trailer brakes engage at the same time as your tow vehicle’s brakes, preventing excessive wear, and providing better control and stability during braking.

What Are The Benefits Of Using Hopkins Trailer Brake Controllers?

Using hopkins trailer brake controllers offers several benefits, including improved braking performance, increased safety, reduced wear and tear on the tow vehicle and trailer, and enhanced control and stability when towing.

How Do I Select The Right Hopkins Trailer Brake Controller For My Vehicle?

To select the right hopkins trailer brake controller, consider factors such as your vehicle’s towing capacity, the type and weight of the trailer you will be towing, and the brake system compatibility with your vehicle.

How Can I Install A Hopkins Trailer Brake Controller?

Installing a hopkins trailer brake controller involves connecting the controller to your vehicle’s electrical system, mounting it in a convenient location, and adjusting the settings to match your trailer’s braking requirements. Refer to the instruction manual for detailed installation steps.

Are Hopkins Trailer Brake Controllers Compatible With All Trailer Types?

Hopkins trailer brake controllers are compatible with various trailer types, including utility trailers, travel trailers, fifth-wheel trailers, and more. However, it is essential to ensure the controller you choose is suitable for your specific trailer’s braking system.

Can A Hopkins Trailer Brake Controller Improve My Towing Experience?

Yes, a hopkins trailer brake controller can significantly improve your towing experience by providing seamless and synchronized braking, enhancing safety, control, and stability, and reducing the risk of accidents or damage to your tow vehicle and trailer.

Conclusion

To conclude, hopkins trailer brake controllers offer an excellent solution for individuals in need of reliable braking systems for their trailers. With their advanced technology and user-friendly interface, they provide seamless and efficient control over trailer braking. By utilizing the latest innovations in electronic braking, the controllers ensure a safe and smooth towing experience.

The variety of options available caters to different trailer sizes and weight capacities, allowing users to find the perfect fit for their specific needs. Moreover, the straightforward installation process makes it easy for anyone to set up and start using the controllers immediately.

Whether you are a professional hauler or an occasional trailer user, hopkins trailer brake controllers provide the peace of mind knowing that your trailer will be safely brought to a halt when needed. Invest in a reliable braking system and enjoy a safer towing experience with hopkins trailer brake controllers.