The headlamp washer function is only activated if the dipped or main beam headlamps are switched on.The headlamp washer command is not a specific command, it is the same one given by the steering column switch unit right lever to carry out the front windscreen washer function.The headlamp washer function is activated each time the front windscreen washer control is operated.The supply line for the headlamp washer pump is protected by a specific fuse and operated by a relay, both housed in the engine compartment junction unit.