How do you know if a trailer has antilock brakes?

To determine if a trailer has antilock brakes, you can look for an ABS (Antilock Braking System) indicator light on the trailer's brake controller, which typically illuminates when the system is activated. Additionally, check the trailer's specifications or owner’s manual, as they often indicate whether ABS is included. Physically inspecting the brake system for ABS components, such as wheel speed sensors and an ABS control module, can also confirm its presence. Lastly, you can consult with the manufacturer or a professional mechanic for verification.