If your trailer has electric brakes, it should also have a trailer breakaway system. This important safety device is designed to stop your trailer if it ever becomes disconnected from your tow vehicle. While many people confuse a breakaway system with a trailer brake controller, the two serve different purposes and work together to keep you safe on the road.
Whether you own an enclosed trailer, dump trailer, utility trailer, equipment trailer, or car hauler, understanding how a breakaway system works is an essential part of safe towing.
What Is a Trailer Breakaway System?
A trailer breakaway system is an emergency braking system that automatically applies the trailer's electric brakes if the trailer separates from the tow vehicle.
A typical breakaway system includes:
● Breakaway switch
● Breakaway cable
● Removable safety pin
● 12-volt breakaway battery
● Wiring connected to the trailer's electric brakes
If the trailer disconnects from the hitch, the cable pulls the pin from the switch. The onboard battery immediately supplies power to the trailer's electric brakes, helping bring the trailer to a controlled stop.
Why Is a Trailer Breakaway System Important?
Although trailer separations are rare, they can happen because of equipment failure, improper hitching, or accidents.
A properly functioning breakaway system helps:
● Stop a runaway trailer.
● Protect other drivers on the road.
● Reduce the severity of accidents.
● Meet state and federal trailer safety requirements.
● Provide peace of mind while towing.
Think of your breakaway system as your trailer's emergency backup braking system.
When Is a Breakaway System Required?
Requirements vary by state, but most trailers equipped with electric brakes are also required to have a functioning breakaway system.
Many states require breakaway systems on trailers with a Gross Vehicle Weight Rating (GVWR) of 3,000 pounds or more.
Your trailer should include:
● Electric brakes.
● Breakaway switch.
● Charged breakaway battery.
● Properly functioning emergency braking system.
Always verify the towing laws in your state before traveling.
How Does a Trailer Breakaway System Work?
During Normal Towing
During everyday driving:
● The breakaway cable is attached to the tow vehicle.
● The safety pin remains inserted.
● Your brake controller operates the trailer brakes normally.
● The breakaway battery stays fully charged and ready.
If the Trailer Becomes Disconnected
If the trailer separates from the tow vehicle:
● The breakaway cable tightens.
● The safety pin is pulled from the switch.
● The breakaway battery instantly sends power to the trailer brakes.
● The trailer brakes engage automatically.
● The trailer slows to a stop.
Trailer Brake Controller vs. Breakaway System
Many people think these are the same thing—but they're not.
Trailer Brake Controller
● Is installed inside the tow vehicle.
● Operates during normal braking.
● Controls how much braking force is sent to the trailer.
● Works only while the trailer remains connected.
Trailer Breakaway System
● Is mounted on the trailer.
● Activates only during an emergency separation.
● Uses its own dedicated battery.
● Continues working even after the electrical connection is lost.
Together, these systems provide complete braking protection.
How to Inspect Your Breakaway System
Before every trip, check the following:
● Breakaway battery is fully charged.
● Breakaway cable is not frayed.
● Safety pin is secure.
● Switch operates properly.
● Trailer brakes engage during testing.
● Battery box is secure.
● Wiring is free of corrosion or damage.
A quick inspection only takes a few minutes and can prevent costly repairs or dangerous situations.
Common Breakaway System Problems
Like any trailer component, breakaway systems require routine maintenance.
Common issues include:
● Dead battery.
● Corroded wiring.
● Damaged switch.
● Broken or stretched cable.
● Improper cable attachment.
● Weak trailer brakes.
● Battery charging problems.
Annual inspections help keep your trailer safe and compliant.
Professional Trailer Brake Service
At Load'em Up Trailers, we provide complete trailer brake service, including:
● Breakaway switch replacement.
● Breakaway battery replacement.
● Trailer brake controller installation.
● Electric brake repair.
● Trailer wiring repair.
● Brake adjustments.
● Annual trailer safety inspections.
● Complete trailer brake diagnostics.
Whether you own a cargo trailer, dump trailer, utility trailer, equipment trailer, or enclosed trailer, our experienced technicians can help keep you towing safely.
Learn More About Trailer Safety
Additional resources:
● National Highway Traffic Safety Administration (NHTSA) – Towing Safety
● Dexter Axle – Trailer Brake Components
Frequently Asked Questions
Does every trailer need a breakaway system?
No. However, most trailers equipped with electric brakes are required to have one.
Can I tow with a dead breakaway battery?
No. If the battery is dead, the emergency braking system will not function properly if the trailer becomes disconnected.
Does a breakaway system replace a brake controller?
No. A brake controller is used during normal towing, while the breakaway system is designed only for emergency trailer separation.
How often should I test my breakaway system?
Inspect it before every trip and have it professionally serviced at least once each year.
Final Thoughts
A trailer breakaway system is one of the most important safety components on your trailer. While your brake controller helps stop the trailer during everyday driving, the breakaway system is there for the unexpected.
Before every trip, inspect your breakaway cable, battery, switch, and trailer brakes. If you have any questions about your trailer's braking system, stop by Load'em Up Trailers. Our team is here to help you tow with confidence.