You supply air to the trailer tanks by:
A. Pushing in the trailer air supply valve.
B. Pulling out the trailer air supply valve.
C. Connecting the service line glad hand.
Answer: A. Pushing in the trailer air supply valve.
A. Pushing in the trailer air supply valve.
B. Pulling out the trailer air supply valve.
C. Connecting the service line glad hand.
Answer: A. Pushing in the trailer air supply valve.
If the answers is incorrect or not given, you can answer the above question in the comment box. If the answers is incorrect or not given, you can answer the above question in the comment box.