If the brakes did not release when you pushed the trailer air supply valve, you should
a) Check the air line connections
b) Cross the air lines
c) Check the electrical cables
Answer: a) Check the air line connections
a) Check the air line connections
b) Cross the air lines
c) Check the electrical cables
Answer: a) Check the air line connections
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.