Michigan CDL Air Brakes Practice Questions - Michigan CDL Air Brakes Knowledge Test Exam

Under Michigan CDL Manual Section 5, what does the stop-light switch in an air brake system do?

It turns on the brake lights when air pressure is applied to the service brakes It activates the parking brake automatically It bleeds the supply tank It controls the trailer air

Correct Answer:

It turns on the brake lights when air pressure is applied to the service brakes

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