You have a major leak in the service line and you put on the brakes. Service air pressure will escape and cause the:

Trailer emergency brakes to come on.. Section 6.2: If air pressure drops low enough due to a leak, the trailer emergency brakes activate.

You have a major leak in the service line and you put on the brakes. Service air pressure will escape and cause the:

ANSWER BREAKDOWN
  • A. Correct. If air pressure drops low enough due to a leak, the trailer emergency brakes activate.
  • B. Incorrect. "Engine to stop." is not correct. If air pressure drops low enough due to a leak, the trailer emergency brakes activate.
  • C. Incorrect. "Radio to turn off." is not correct. If air pressure drops low enough due to a leak, the trailer emergency brakes activate.
  • D. Incorrect. "Wipers to start." is not correct. If air pressure drops low enough due to a leak, the trailer emergency brakes activate.