What should happen to the wheel when the breakaway cable is pulled and functioning properly?

When the breakaway cable is pulled and functioning properly, the intended outcome is that the braking system engages, which results in the wheel stopping its rotation. The breakaway cable is a safety feature designed to activate the brakes of a trailer if it becomes detached from the towing vehicle. When this cable is pulled, it triggers the brake mechanism, stopping the wheel to prevent further movement and minimize the risk of an accident.

This function is critical for safety, as it ensures that the trailer does not continue to roll away uncontrolled. The other outcomes listed do not align with the safety function of the breakaway cable system; they indicate a malfunction or an improper response to the cable being activated.