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The screenwasher motor is an electrical mechanism that activates a pump which will cause screenwash to be fed to the screenwash jets situated just below the windscreen. In most cases the screenwash motor and pump are enclosed in one unit that is situated with the screenwash reservoir in the engine compartment. Occasionally the motor and pump are two separate units. The screenwash motor is activated by a stick-lever usually found on the steering column.
If the motor fails to operate this could be due to a blown fuse, a poor earth return or corrosion to the terminals, or the motor itself is faulty. If the motor needs replacing it is advisable to also fit a new non-return valve and filter in the reservoir. If the motor is operating properly but no screenwash appears from the screenwash jets it’s possible that there is a blockage or debris in the filter of the pump or in the jet nozzles. To check whether the pump is operating it’s normal to hear a whirring noise from the reservoir area when the stick-lever is pushed. This should mean both motor and pump are working correctly.
If replacing a broken motor with one that is not an exact replica it may be possible to bypass the old motor and fit the replacement with a new mounting.