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Pressure Differential Warning Light Switch (Combination Valve Only)

  1. Attach a bleeder hose to bleed valve at either rear brake. Immerse other end of hose in container filled with clean brake fluid. Turn ignition on.
  2. Open bleed valve while pressure is being applied to brake pedal. Red BRAKE warning light should activate. Close bleed valve before pressure is released from pedal.
  3. Reapply brake pedal using moderate to heavy pressure. Red BRAKE warning light should go out. Repeat test on front brake system. System should function in same manner. Turn ignition off.
  4. If Red BRAKE warning light does not operate as specified for either system but comes on when electrical circuit is tested, Red BRAKE warning light switch portion of valve is defective. Replace combination valve. See COMBINATION VALVE  under REMOVAL & INSTALLATION.
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