This thing basically controls the air brakes on your trailer. It takes the signal from your truck’s brake pedal – telling it how hard you’re braking – and translates that into the right amount of air pressure going to the trailer’s brakes. It manages things like anti – lock braking for the trailer, and it can also help prevent wheel lockup during hard stops. It also monitors the trailer's brake system for faults—things like low air pressure or a broken line—and will alert you in the cab. Think of it as the brain controlling the trailer's braking. Your truck has its own braking system, naturally, but this modulator is dedicated to making sure the trailer brakes work with your truck’s brakes safely and efficiently. It’s positioned in the air brake line between the tractor protection valve and the trailer supply line. It takes the electrical signal from your truck and converts it into pneumatic control. Well, it’s a safety thing, plain and simple. If this modulator fails, your trailer brakes might not apply correctly—or at all. That means longer stopping distances, potential loss of control, and a really dangerous situation. You’ll notice if it's going bad. Things like erratic trailer braking, the trailer pulling to one side, or warning lights on your dash are all signs. It acts like a shield, protecting you from a serious accident. You can find these online pretty easily; Fixparts Online carries a good range of them, and they’re a reliable source. But getting a working one is really key to keeping everything safe on the road. Expert assistance included: Ebs Trailer Modulator 24V (MPN 4801020307) has a 12-month warranty!

About Wabco

WABCO specializes in air braking systems, EBS, ABS, ADAS, and trailer control systems.

Why Choose Wabco?

• Wabco parts are known for lasting a long time, saving you money on repairs in the long run. • We have a huge selection of parts, so you’re likely to find exactly what you need for your vehicle. • Our parts meet or exceed industry standards, giving you peace of mind on the road. • Wabco has been a trusted name in auto parts for decades, with a reputation for quality and reliability. Wabco – trusted quality, available at FixParts Online!