What should you ensure about trailer brakes before backing under a trailer?

Before backing under a trailer, it is essential to ensure that the trailer brakes are locked. This means that the brakes should be fully engaged to prevent any movement of the trailer while you are coupling. Having the trailer brakes locked helps stabilize the trailer and ensures that it stays in position, preventing any unintended roll or shift that could result in an accident.

When the brakes are locked, the trailer remains steady, allowing for a safe and controlled connection with the towing vehicle. This is particularly important because if the trailer rolls away while you are trying to back under it, it can lead to dangerous situations, including possible collisions or difficulty in safely achieving the hitch.

Ensuring that the proper state of the trailer brakes is maintained is a key part of safe driving practices when operating combination vehicles. This critical safety measure prevents issues during the coupling process and ensures that the trailer remains secure until you are ready to drive.