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Basic Operational Check

  1. Modulator should cycle one time, making a clicking sound as ignition is turned "ON". Brake warning light should remain off. Raise rear of vehicle and position on safety stands. Start engine and place transmission in "D". Accelerate to 40 mph. Apply brakes slowly until wheels attempt to lock. Skid control should immediately prevent lock. Brake warning light should remain off.
  2. Decrease speed to 10 mph and hold constant. Modulator should cycle during constant operation. Brake warning light should remain off. Shift transmission to neutral and apply brakes (100 lbs. pedal force). Brake warning light should remain off.
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