If there is no sound, then it means the pump has failed or there is no power to the pump. You should hear the whirring of the pump. Now, stand outside and switch on the windshield washer. Switch on the vehicle and turn down the driver’s door window. The easiest way to check if the pump is working is by doing a noise test. With each pumping process, a larger area is wetted with washer fluid, at the same time, however, the finer nozzles tend to clog faster.ĭiagnosis: Before you decide on replacing the nozzles, you must rule out any problem with the washer pump or the hoses. However, modern cars are equipped with so-called “fan nozzles” or “micro-emitters” which produce a wider and finer spray jet. In older vehicles, drivers could easily clean the nozzles themselves by inserting a fine needle into the holes without any effort. The impurities can then be collected by the rainwater running off, which then gets caught in the nozzles and gradually clogs them. They are located near the bottom of the windshield, where dead insects, dust, pollen and limescale are often deposited. Clogged nozzles are often the reason why the windscreen washer system does not work on Tiguan.
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