x 9000 MPH x 0 x 5 x 1Click icons to use
If the driver crosses the air lines when hooking up to an old trailer:
If the driver crosses the air lines when hooking up to an old trailer:
  • The hand valve will apply the tractor brakes instead of the trailer brakes.
  • If the trailer has no spring brakes, the driver may drive away, but will not have trailer brakes.
  • The brake pedal will work the trailer spring brakes instead of the air brakes.