King of the Highway: The Ultimate Big Rig & Semi-Truck Operations Challenge

What is the function of the blue gladhand connector line?

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Correct!

Incorrect!

The blue line is the service brake line. It signals air to the trailer brake valves only when the trucker taps the cab brake feet pedal or engages the hand valve (trolley valve).

What is the function of the blue gladhand connector line?

To feed high voltage trailer accessory power

To transfer fuel to trailer coolers

To control trailer service brakes on demand

To purge excess water from trailer tanks

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