4802040020 Wabco Trailer Control Valve

The Trailer Control Valve from Wabco (MPN: 4802040020) is sourced from Poland and has supplier-listed dimensions of 182 x 169 x 176 mm. It is typically used within the Brakes > Air Brake Systems > Trailer Brake Controls category of automotive replacement parts. Dimensions are provided by the supplier and may include packaging dimensions. Trailer brake controls regulate the electric brakes on towed trailers, functioning independently of the tow vehicle’s hydraulic system. Typically installed under the dashboard, these units receive input from the driver via a manual lever or integrated control module. Proportional controllers apply braking force to the trailer based on the tow vehicle’s deceleration, utilizing a PWM signal to vary current to the trailer’s electromagnets. Timed controllers activate the trailer brakes based on pre-set intervals. Modern systems frequently include diagnostic features and compatibility with brake gain adjustment for customized performance.