§393.49 Single Valve To Operate All Brakes

Question 1: Does a combination of vehicles using a surge brake to activate the towed vehicle's brakes comply with §393.49?

Guidance: No. The surge brake cannot keep the trailer brakes in an applied position. Therefore, the brakes on the combination of vehicles are not under the control of a single valve as required by §393.49 (see question number 1 in §393.48)