Otis Singleton
Electric trailer brakes are becoming increasingly popular due to their responsiveness and effectiveness compared to traditional surge brakes. They are the most common type of trailer brake and are activated by an electromagnet when the driver applies the brakes in the towing vehicle. This type of brake offers more ease when braking and can be adjusted to match the load weight and road conditions. Electric trailer brakes can come with discs and pads or drums and shoes. When inspecting the trailer from the outside, electric brakes will show a disc behind the rims.
| Characteristics | Values |
|---|---|
| How they work | An electromagnet is used to activate the brakes when the driver applies brakes on the towing vehicle. |
| How electricity reaches the brakes | An electrical connection on the trailer plugs into the connector on the vehicle. Electrical wires run from the trailer connector back to each brake on the axle. |
| How braking force is controlled | A brake controller is used to control the braking force. |
| What they look like | There is a disc behind the rims. |
| Types | Proportional and time-delayed. |
| Advantages | More responsive and effective than traditional surge brakes. Easier to maintain and adjust than surge brakes. |
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What You'll Learn
Electric brakes are activated by an electromagnet
Electric trailer brakes are activated by an electromagnet. They are the most common type of trailer brake and are known for their ease of use and adjustability. This type of braking system is activated when the driver applies the brakes on the towing vehicle.
The electromagnet in the electric trailer brake system is a crucial component that ensures the safe and effective operation of the brakes. It is responsible for converting the electrical signal from the brake controller into mechanical force, which then applies the brakes. This process involves energizing the electromagnet, which creates a magnetic force that pulls a lever to activate the brake shoes.
Electric trailer brakes offer several advantages over traditional surge brakes. One of their key benefits is adjustability, allowing drivers to fine-tune the braking force to match the load weight and road conditions. This adjustability is achieved through the brake controller, which can be modified to adjust the braking force to the trailer's weight. Electric brakes are also easier to maintain and more reliable in the long run.
To ensure proper operation of electric trailer brakes, it is essential to have a compatible connector. A 7-pin plug is commonly used to provide the necessary power and brake electronics for electric brakes. This connector ensures the safe functioning of the trailer brakes and enhances overall road safety.
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They are controlled by an electronic brake controller
Electric trailer brakes are controlled by an electronic brake controller, which is installed in the vehicle's cab. This brake controller is an essential component of the braking system, as it controls the braking force of the trailer. When the driver applies the brakes in the towing vehicle, the controller sends an electrical signal to the trailer brakes, activating them. This process involves several steps and components working together.
Firstly, the brake controller sends a signal to the electric brakes on the trailer, which is made possible by an electrical connection between the trailer and the towing vehicle. This connection is typically established through a 7-pin plug, which provides the necessary power and brake electronics for safe trailer operation. The 7-pin connector ensures that the trailer's brakes function properly and in sync with the towing vehicle.
The brake controller plays a crucial role in adjusting the braking force. It allows drivers to fine-tune the braking force according to the load weight and road conditions. This adjustability is a key advantage of electric trailer brakes over other braking systems. The controller's settings can be modified to ensure the optimal amount of power is applied to the trailer brakes during deceleration.
Additionally, there are two main types of electric trailer brake controllers: proportional and time-delayed. Proportional brake controllers utilise sensors to detect the braking force of the towing vehicle and then apply the trailer brakes proportionally. This results in a more natural and responsive braking experience, reducing the risk of trailer sway. On the other hand, time-delayed brake controllers activate the trailer brakes after a predetermined delay following the application of the towing vehicle's brakes. While less sophisticated, time-delayed controllers are still effective for most towing scenarios.
In summary, the electronic brake controller is the brains behind electric trailer brakes, ensuring safe and responsive braking. By sending electrical signals, adjusting braking force, and offering different control modes, the brake controller enhances the overall towing experience and provides drivers with confidence and control during deceleration.
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They can be adjusted to meet the trailer's weight
Electric trailer brakes can be adjusted to meet the trailer's weight. This is important for towing safely, and it's recommended that you check and adjust your utility trailer brakes every 3,000 miles or 3 months.
Electric trailer brakes use electrical signals, electromagnets, and brake pads to help the trailer stop while towing. The electromagnets draw power from the vehicle to squeeze the brake pads. As power increases, the electromagnets apply more stopping force.
To adjust the electric trailer brakes to meet the trailer's weight, you can follow these steps:
- Jack up the trailer so that the wheel you are starting with can freely spin.
- Chock the trailer wheels to secure the trailer and prevent it from rolling out of place.
- Locate the adjuster plugs on the backside of the brake assembly, usually found below the brake drum.
- Remove the plugs using a screwdriver or pliers and look inside for the adjustment screw, which can be identified by small teeth around it.
- Spin the trailer wheel or drum and place your screwdriver or adjustment spoon on one of the ridges while it's spinning.
- Using a trailer brake spoon, brake adjustment tool, or flathead screwdriver, turn the star wheel adjuster inside the brake chamber.
- Push down on the brake spoon handle to pry the adjuster wheel upward, tightening the brake pads or shoes.
- Turn the wheel one click at a time and spin the tire between each click to ensure it spins freely.
- Once the trailer tire becomes difficult to turn, stop tightening the adjuster. If necessary, loosen the adjuster wheel by prying upward on the adjustment tool.
- The tire should spin freely but with a slight drag, indicating that the trailer brake pads are properly engaged.
- Replace the cover on the trailer brake access point and check the torque on your trailer tire nuts, following the manufacturer's specifications.
Additionally, when installing new brakes, you will need to perform a break-in process. Drive the trailer to an open area and get up to around 40 MPH. Apply the manual override on your brake controller, ensuring it is set high enough to fully engage the trailer brakes. Do not use the brake pedal, and repeat this process about 20 to 30 times to properly seat the brakes.
It is important to note that the specific steps for adjusting electric trailer brakes may vary depending on the make and model of your trailer. Always refer to the owner's manual or seek professional assistance if you are unsure about the adjustment process.
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They are more responsive than surge brakes
Electric trailer brakes are more responsive than surge brakes. This is because electric brakes can be adjusted for the load being carried and can be manually applied if necessary. They also work better on slopes and rough terrain. Electric brakes are more interactive and give you more control over how the trailer handles. They can be set so that you don't feel the trailer pushing or pulling back when braking.
Electric brakes are activated when the driver applies the brakes on the towing vehicle. This sends a current to the brake control in the vehicle, which then sends a current back to the trailer to activate the brakes. An electromagnet is used to activate the brakes, giving the trailer more ease when braking compared to surge brakes.
Surge brakes, on the other hand, operate independently of the towing vehicle's electrical system. They rely on the momentum of the trailer to engage the brakes when it pushes against a surge brake actuator. This mechanism allows the trailer to slow down proportionally to the towing vehicle, but it may not provide as much control as electric brakes.
In terms of appearance, electric trailer brakes have a disc behind the rims that can be seen from outside the trailer. They also require a 7-pin plug to provide power, light, and brake functions, while surge brakes do not have this requirement.
Overall, electric trailer brakes offer a more responsive and controlled braking experience compared to surge brakes, making them a popular choice for heavier loads and trailers.
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They are more reliable than surge brakes
Electric trailer brakes are more reliable than surge brakes. Firstly, electric brakes are more responsive and easier to control. When the driver applies the brakes, an electromagnet activates the trailer brakes, allowing for more nuanced braking. In contrast, surge brakes rely on the momentum of the trailer pushing against the towing vehicle, which can be less precise.
Secondly, electric brakes offer greater flexibility and control. They can be adjusted for the load being carried and manually applied if needed, making them ideal for slopes and rough terrain. Surge brakes, on the other hand, are less adaptable and may not perform as well in such conditions.
Thirdly, electric brakes are more widely compatible with modern vehicles. Most newer vehicles have factory brake controllers that integrate seamlessly with electric trailer brakes. While surge brakes are self-contained and don't require a brake controller, they may not be as compatible with modern braking systems.
Additionally, electric brakes have simpler maintenance requirements. While they may have higher upfront costs and installation time due to the need for extra equipment, their long-term maintenance is straightforward and cost-effective. Regular greasing of the plug is essential for preventing issues.
Finally, electric brakes are safer and more responsive in critical situations. For example, the Lippert Anti-Lock Braking System (ABS) for trailers integrates with existing electric braking systems to provide reliable braking power in diverse conditions, such as slippery roads or abrupt stops. This level of responsiveness and safety is a key advantage of electric brakes over surge brakes.
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Frequently asked questions
Electric trailer brakes are a type of trailer brakes that are actuated by electricity, unlike traditional brakes that are actuated by pressure from brake fluid.
Electric trailer brakes work by sending an electronic signal from the tow vehicle to the trailer when the brake pedal is pressed. This signal activates an electromagnet inside the trailer brake assembly, causing the brake shoes or pads to engage the drum or rotor.
Electric trailer brakes can come with discs and pads or drums and shoes, similar to car brakes. If you are looking from outside the trailer, you will see a disc behind the rims if there are electric brakes.
Electric trailer brakes offer a more responsive and effective braking experience compared to traditional surge brakes. They are also easier to maintain and adjust, as they can be fine-tuned using the brake controller to match the trailer's weight and road conditions.
The type of trailer brake you need depends on various factors such as your state's laws, the weight of the trailer, and your personal preferences. Electric trailer brakes are the most common type and are generally more reliable in the long run. However, surge brakes are also a popular choice, especially for marine trailers, as they do not rely on electrical connections.
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