If you release the trailer hand brake but the trailer doesn't move, what might be the problem?

The trailer emergency brakes are still on (air not supplied).. Section 6.4: You must push in the red trailer supply knob to release the

If you release the trailer hand brake but the trailer doesn't move, what might be the problem?

ANSWER BREAKDOWN
  • A. Correct. You must push in the red trailer supply knob to release the emergency brakes.
  • B. Incorrect. "The engine is off." is not correct. You must push in the red trailer supply knob to release the emergency brakes.
  • C. Incorrect. "The tires are flat." is not correct. You must push in the red trailer supply knob to release the emergency brakes.
  • D. Incorrect. "The road is sticky." is not correct. You must push in the red trailer supply knob to release the emergency brakes.