Activate the air generator | |
Push in the trailer air supply valve | |
Activate the service line | |
Pull out the trailer air supply valve |
White | |
Yellow | |
Black | |
Red |
Distributes air throughout the cab and to each of the trailers | |
Supplies air to the footbrake and trailer handbrake | |
Carries air controlled by the footbrake or trailer handbrake | |
Marks the maximum refill point for air tanks |