The headlight washer is controlled by the general module V of the central body electronics. The pump is powered by an external relay.
When the light is switched on (terminal 58) the headlight washer function is activated together with the windscreen washer function. One cleaning operation consists of two spray cycles.
After initial activation, the headlight washer function is carried out only after every 5th windscreen wash and a lockout time of 3 minutes.
The repeat inhibit and timer are reset by switching off terminal R.