How can you identify if a trailer is equipped with anti-lock brakes?

A trailer equipped with anti-lock brakes can be identified by the presence of a yellow lamp on the left side. This yellow indicator light is part of the system's design and serves as a warning that the trailer has an anti-lock braking system (ABS). When the ABS is functioning correctly, this light gives drivers important information about the brake system's status, helping ensure safer operation.

Recognizing this indicator is vital for drivers, as it reminds them that the trailer is equipped with enhanced braking capabilities that can help prevent wheel lock-up during hard braking situations. This system is particularly useful in maintaining vehicle control in slippery conditions.

Other options related to the identification of trailers with ABS either provide incorrect information about the indicator light's color or suggest the absence of indicators altogether, which would be misleading, as the yellow lamp is a standard feature for trailers with anti-lock brake systems.