For 1990-2009 cars only
- Run the wiper arm and blade assemblies to the mid wipe position.
- Remove the blade from the arm.
- Attach a scale to the wiper arm tip and measure the force required to lift the arm perpendicular to the windshield to the normal working height of the arm (the height with the blade attached).
- Replace the arm if tip pressure is not within specifications.
The force required should be between 8.3 and 10.1 newtons (30 to 36 ounces).
