For 1990-2009 cars

Checks | Action
--- | ---
Check for a restricted line or hose. | Replace or repair the line.
Check for a faulty air brake valve. | Refer to Air Brake Application Valve Operational Check .
Check if the brakes are out of adjustment. | Refer to Air Drum Brake Adjustment in Air Drums.
Check for air line leaks. | Refer to Low Air Pressure Switch Operational Check .
Check if the governor cut-out adjustment is too low. | Refer to Air Compressor Governor Valve Adjustment in Air Compressor.
Check for worn linings or drums. | Refer to Air Drum Brake System Inspection in Air Drums.
Check for brake pedal linkage binding. | Refer to Air Brake Pedal Replacement .
Check for brake shoe binding. | Refer to Brake Shoe Inspection in Air Drums.
Check for camshaft bushing binding. | Refer to Air Drum Brake Adjustment in Air Drums.
Check for a safety valve malfunction. | Refer to Air Brake Dryer Safety Valve Exhausting Air .