princessskaylee7604 princessskaylee7604
  • 17-01-2024
  • Engineering
contestada

You are driving a combination vehicle when the trailer breaks away, pulling apart both air lines. You would expect the trailer brakes to come on and?
1) The tractor to lose all air pressure
2) The tractor protection valve to close
3) The trailer supply valve to stay open
4) System parking brake will close

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