GM Service Manual Online
For 1990-2009 cars only

Air Brake Dryer Does Not Purge or Exhaust Air for Isuzu Isuzu MD Steel Tilt (F Model) 1998

Problem

Action

The purge control line exhibits one of following conditions:

    • Broken
    • Kinked
    • Frozen
    • Plugged
    • Disconnected

Determine if the air flows through the purge control line when the air compressor is unloaded.

The air brake dryer purge valve is faulty.

Replace the purge valve.