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Home >> Sterling >> 1988 >> 825 S, 2.5 D >> Repair and Diagnosis >> Brakes >> Traction Control >> Anti-Lock Brake System >> Testing >> Hydraulic Modulator Test >> Pressure Maintain Test

Pressure Maintain Test

  1. Ensure transmission is in Neutral and parking brake released. Turn valve switch to "Front L". Press "P=" button. Left front wheel should turn. Depress brake pedal. Left front wheel should still turn. Release "P=" button. Left front wheel should be locked.
  2. Press "P=" and release brake pedal. Left front wheel should remain locked. If wheel does not remain locked, check if brake lines are positioned correctly. If brake lines are positioned correctly, replace hydraulic modulator. Perform same test with valve switch in each position.
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