15 Windshield Wipers and Washers


.15 Windshield Wipers and Washers.

The windshield wipers shall be inspected for operation, control, condition of blades and arms, or any missing part.


A. Windshield Wipers

  1. Inspect for satisfactory operation. (If vacuum operated, engine shall be idling and control full on.) Windshield shall be free of insects, oil film, or other foreign matter, and should be continuously wet when tested. Wetting the windshield during school vehicle inspection may be waived if water is unavailable or the outside temperature is at or below freezing.
  2.   Inspect for damage, tom, or hardened rubber elements of blades
  3.   Inspect for damaged metal parts of wiper blades or arms.
  4. Inspect for proper contact of blades with windshield. Raise arm away from windshield and release. Arm should return to original position and cause the wiper blades to firmly contact the windshield
B. Windshield Washers (school vehicles only).

(1)   (school vehicles only)


SPECIAL ORDER NO. 23-9506 (April 19, 1995)

SUBJECT: Rear Window Wipers on Certain Vehicles The rear window wiper that is found on some vehicles is not a required vehicle safety component in Maryland. Since the rear window wiper is not a component found in Section 23-104 of the Transportation Article, this component is not to be inspected, and therefore, it is not a part of the vehicle inspection program.

This Order supersedes all other Orders or Memoranda in conflict therewith.

Reject Vehicle If

  1. Wipers inoperative or cannot be controlled or operated by the
  2. A wiper arm or blade is broken or missing
  3. There is insufficient tension of arm to hold blade against windshield.
  4. There are worn or deteriorated blades that do not clean the windshield (within 5 cycles applicable to school vehicles only).
  5. Wiper arms and blades are not the proper size for the windshield.
  6. Not equipped with on/off switch within arm’s length of driver.
  7. Arm(s) fail to return to park position.

Effective as of February 1, 2012