How to Check
The Wiper Blades
Caution! When cleaning the Wiper blades do not use strong household soap, strong
chemical detergents, petrol or solvents.
For the practical test, the Tell Me/Show me question :-
Show me how you would clean the windscreen using the windscreen washer and wipers (you may need to switch ignition on, but don't start the engine)
What you have to do :-
Operate control to wash and wipe windscreen.
If your windscreen is not clear after using the windscreen washer, here are tell-tale signs of worn out wipes.
Lines appearing on windscreen - A wiper blade's rubber can harden or become damaged with age, leaving fine beads of water on the windscreen.
Bands appearing on windscreen - Hardened or aging wiper rubber can cause thicker bands of water on the screen.
Lace Curtains - Arm defects or long periods in the parked position can deform the wiper blade lip, causing a veil sffect across the windscreen. This means visibility danger is greatest when passing other vehicles at night.
Chattering - A defomed wiper element can cause blades to judder across the screen, leaving radial streaks.
Unwashed Margins - A deterioration in the wiper blades or decreased wiper pressure can leave parts of the windsceen unclear.
Noise - Noisey wipers may be a sign that the wiper element is deformed or hardened, so that the wiper blade stucture is worn.
Judder - A deformed wiper element, wrong adaptor or blade aging can result in jerky and noisy wiper arm movement
Wind Lift - If high speeds persistently cause the wiper to miss parts of the screen, either the wiper blade or wiper arm should be replaced.
Clean the outside of the windscreen with a mild detergent. Your windscreen is clean if beads do not form when rinsing with clear water.
Clean the blade by wiping it with a cloth soaked in a washer solution. Rinse the blade with clear water.
If the windscreen is still not clear after cleaning blades and using the wiper, replace the blades.
To replace the blades
Pull the wiper arm up
Push in the lock pin (see diagram RIGHT). Move the wiper blade down the arm until the lock pin is clear, then remove the blade completely.
Insert a new wiper blade to the wiper arm until the pin clicks into place.
That's it. The wiper blades have been checked.
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