Brake Pedals and Lights. Brake Pedal Leverage Brake Pedal Measurements.

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Presentation transcript:

Brake Pedals and Lights

Brake Pedal Leverage

Brake Pedal Measurements

Stoplight Switch Operates the rear brake lights Normally open switch, usually mounted on the brake pedal mechanism When the brake pedal is pressed, it closes the switch Also used for cruise control, transmission, ABS and traction control systems

Examples

Typical Brake Light Circuit

Testing a Brake Light Switch

Brake Warning Light Switch Also called the pressure differential valve Warns the driver of a pressure loss on one side of a dual brake system If a leak develops in either the primary or secondary brake system, unequal pressure pushes the switch piston to one side, grounding the indicator circuit

Brake Warning Light Circuit

BRAKE! Warning Light Circuit

Checking Brake Lights Press the brake pedal Note if any/all work including 3 rd brake light All inop – check fuse and/or switch One inop – check bulb and socket

Seriously?

Close Inspection

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