30.4.
Headlight Wipers and Washers
Two ways in which headlights are cleaned, are by high pressure jets, and by small wiper blades with a low pressure water supply. The latter method is almost the same as windscreen cleaning, but on a smaller scale. The high pressure system (Fig. 30.30) is more liked but can suffer in very cold conditions due to the fluid freezing. In a washing system the reservoir refilling is necessary after about 50 operations.
Bosch has developed a retractable nozzle for headlight cleaners (Fig. 30.30). When the water is pumped to the nozzle it pushes the nozzle from its retracted position, flush with the bodywork. When the washing is completed the jet is then retracted into the housing. Headlight cleaners are often combined with the windscreen washers, due to which they operate each time the windscreen washers are operated provided that the headlights are also switched on.
