3315546 - E2020 DIRECTION INDICATORS / HAZARD WARNING LIGHTS - Functional description

Functional description

The direction indicators and hazard warning lights are controlled by the Check device M45. The supply for the Check device M45 arrives directly from the battery at pin 1 of connector C and 6 of connector E via fuses F17 and F15 of junction unit B2 for the right and left branches of the lights, respectively. The ignition-controlled supply (15/54) arrives via relay T1 and fuse F9 of junction unit B2 at pin 3 of connector B: pin 8 of connector C is earthed. The specific supply for the hazard warning lights arrives at pin 3 of connector D via fuse F8 of junction unit B2. Hazard warning light operation is controlled by a switch located in unit H35:when the button is pressed, an earth signal is sent to pin 9 of connector A of M45. Pin 2 of H35 is operated when the ignition is turned on (15/54) via relay T1 and fuse F6 of junction unit B1; this line gives the go-ahead for lighting up the control panel H35 . The turn signals are activated by stalk unit H5; when the lever is operated in both directions, a signal is sent to pin 5 (left side arrows) and pin 6 (right side arrows) of connector B of M45. The Check device M45 produces two signals which supply the direction indicators: from pin 3 of connector D for the right ones (F11, F21, F31); from pin 1 of connector D for the following ones ( F10, F20, F30). The tail-lights in clusters F30 and F31 are not conventional bulbs but electronic leds:device M45 receives two feedback signals, at pin 2 and 4 of connector D, from these devices located in lights clusters F30 and F31. The warning lights for the direction indicators, located inside the instrument panel E50, are also operated by pins 18 and 17 of connector A of M45. the red LED in switch H35, which lights up the ideogram with the hazard warning lights switched on, is operated by pin 3 of connector A.