E3022 Headlamp washers

Description

The headlamp washer device is responsible for washing the front windscreen and the headlamp lens. The headlamp washer function is operated automatically, with the side lights on, when the windscreen washer is operated by a stalk lever to 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.

The headlamp washer circuit is protected by a specific fuse and regulated by an electronic timer device, located on the right under the dashboard.

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

Description of operation

The headlamp washer J50 is supplied (pin 30) by the direct line from the battery through the headlamp washer fuse B12 and the maxifuse J/B2 of B5 up to 2/99 or of B99 from 2/99.

If the windscreen washer switch is operated, stalk switch H5 sends two signals to the windscreen wiper motor N15; one of these reaches headlamp washer timer J50 (pin S): it is the power source for the ignition-operated line (INT/A) of relay R1 protected by fuse F14. ( Wiring diagram E3020 WINDSCREEN WIPERS/WASHERS ).

With the side lights on, a signal reaches pin 56 of J50 from the steering column switch unit H5 line. ( Wiring diagram E2010 SIDE LIGHTS / NUMBER PLATE ).

When there are both signals at pins S and 56, the relay, inside the device J50 which supplies the electric headlamp washer pump N25 with impulses of about half a second, is energized for a certain time.

Wiring diagram

Components

Component location