186002818 - E2020 DIRECTION INDICATORS/HAZARD WARNING LIGHTS - FUNCTIONAL DESCRIPTION

Operational description

The circuit is controlled by the switch control unit H90 .

The intermittent type device is located in the steering column switch unit H5. It is earthed at pin 7 of connector A and receives a supply signal at pin 7 of connector D via the actual switch H90, when:

• the hazard warning lights are not on: the power supply is ignition-operated (INT) via fuse F1 of junction unit B1
• the hazard warning lights are on: the power supply comes directly from the battery via the line for maxifuse J/B1 of B5 and fuse F9 of junction unit B1.

The intermittent device then produces a signal which supplies both the switch for the steering column switch unit direction indicators H5 and the switch for the hazard warning lights H90 . Operating the lever for the steering column switch unit H5 in either direction provides a power supply for the right indicators ( F11 , F21 , F31 ) or the left ones ( F10 , F20 , F30 ). The warning light, located in the instrument panel E50 comes on simultaneously . By pressing the switch in the control unit H90 on the other hand the three contacts that simultaneously supply all the lights (left and right branches) and the red LED in the actual switch that lights up the ideogram are closed. In switch H90 there is also a special LED that comes on through the ignition-operated supply (INT/A) protected by shunt fuse B27 . Versions with alarm: all the hazard warning lights are also activated by the alarm system control unit M30 ).     Vedere E7015 ALLARME ) Versions without alarm: all the hazard warning lights are activated by relay J43 which receives a direct supply from the battery, via the line for maxifuse J/B1 of B5 and fuse F9 of junction unit B1 : the relay is energized by a signal coming from the remote control receiver M35 , pin 1.