BRAKE PEDAL ADJUSTMENTS

Brake Pedal Height

Measure the brake pedal height from the floor of the vehicle to the upper surface of the brake pedal. The distance should be 6.9–7.1 in (176–181mm). If the brake pedal height is incorrect, adjust as follows:

1. Detach the stop lamp switch connector.

   Fig. 1: Measure the brake pedal height at A and compare to specifications

   Fig. 2: Adjust the brake pedal height by increasing or decreasing the length of the operating rod

   Fig. 3: Inspect the clearance between the stop light switch and the brake pedal stop and compare to specifications

2. Loosen the locknut on the base of the stop light switch and move the switch to a position where it does not contact the brake pedal.
3. Loosen the operating rod locknut. Adjust the height of the brake pedal by turning the operating rod using pliers. Once the desired pedal height is obtained, tighten the locknut on the operating rod.
4. Screw the stop light switch until the it contacts the brake pedal stopper. Turn switch in until the brake pedal just starts to move. At this point, return (loosen) the stoplight switch ¹⁄₂ –1 turn and secure in this position by tightening the locknut. In this position, the distance between the lower stop light switch case and the brake pedal stop should be 0.02–0.04 in. (0.5–1.0mm).
5. Attach the electrical connector to the stop light switch.
6. Check to be sure that the stop lights are not illuminated with no pressure on the brake pedal.
7. Without starting the vehicle, depress the brake pedal. If the brake light switch is properly connected, the brake lights will illuminate.

Brake Pedal Free-Play

1. With the engine off, depress the brake pedal fully several times to evacuate the vacuum in the booster.

   Fig. 4: Inspect brake pedal free-play

2. Once all the vacuum assist has been eliminated, press the brake pedal down by hand and confirm that the amount of movement before resistance is felt is within 0.1–0.3 in. (3–8mm).
3. If the free-play is less than desired, confirm that the brake light switch is in proper adjustment.
4. If there is excessive free-play, look for wear or play in the clevis pin and brake pedal arm. Replace worn parts as required and recheck brake pedal free-play.