E3022 Headlamp washers

Description

The headlamp washer device is responsible for washing the front windscreen and the headlamp lens.

The headlamp washer function is managed by the Body Computer which automatically operates the headlamp washers - with the dipped or main beam headlamps on - when the windscreen washer is operated, via the lever on the right of the steering wheel.

The headlamp washer device consists of a detergent delivery pump and a nozzle in the bumpers that sprays a powerful jet onto the headlamp.

A timer operates the headlamp washer pump in a series of half second pulses.

The headlamp washer circuit is protected by a fuse and adjusted by a specific relay, located in the engine compartment control unit.

Description of operation

The relay T17 for the engine compartment control unit B1 is supplied by the line for fuse F9 for the engine compartment control unit B1 and is energized by the line 'controlled by the ignition' (INT/A) from fuse 31 of the underdashboard control unit B2.

The relay operates the headlamp washer pump N25 directly when the command arrives from the Body Computer M1.

The Body Computer, in turn, processes the signal, at pin 14 of connector A, coming from the steering column switch unit H5 and the go ahead with the main beam or dipped headlamps on.

Wiring diagram

Components

Component location