E2010 Side lights / number plate

Description

The side lights are switched on when the ring nut on the steering column is turned to the first position, with the ignition in the ON position.

They can also be turned on by extracting the key and turning it in the opposite direction - PARK position - keeping the special button pressed.

Turning on the side lights also turns on the number plate lights and numerous other interior lights for passenger compartment lighting and instrument & control lighting (these lines are described and illustrated in the diagrams for the components to which they refer).

The circuit is protected by two fuses, one for the right-hand lights, one for the left-hand lights.

A warning light in the panel (rev counter module) indicates that the side lights have been switched on.

The correct operation of the side lights and the number plate lights is controlled by the check device for the exterior lights located inside the rev counter module.

The following faults may occur:

• blown bulb
• bulb s.c. to earth or positive

A special failure warning light, also in the rev counter module, comes on for all other faults in the various circuits. This warning light comes on for about 4 seconds when the ignition key is turned to MAR, to indicate it is working properly, then it goes off.

Description of operation

The signal for activating the side lights is sent to pin 3 of connector A of the rev counter E15 from switch H1 (POS).

This signal reaches the ignition switch H1 (STAZ) from the supply controlled by the ignition (INT) for the line protected by fuse B11 up to 2/99 or fuse F4 of the additional fuse box B98B from 2/99.

Alternatively - with the key in the PARK position - the supply arrives directly from the battery (maxifuse IGN of B5) up to 2/99 or of B99 from 2/99.

The supply for the check device inside E15 arrives directly from the battery. (maxifuse J/B2 of B5 up to 2/99 or of B99 from 2/99) to pins 10 and 16 of connector A, through fuses F2 and F3 of the junction unit B1; The former protects the left light circuits, the second protects the right light circuit.

The check device therefore controls the supply of the front side lights F10 (left) and F11 (right), the rear side lights F30 (left) and F31 (right) and the number plate lights F50 and F51.

At the same time, the "side lights on" warning light - inside E15 - is also switched on with pin 14 of connector A providing the earth.

In the case of failures in the circuit, the "lights failure" warning light - inside E15 - comes on, with the supply controlled by the ignition (INT) for the line protected by fuse B11 up to 2/99 or fuse F4 of the additional fuse box B98B from 2/99, pin 15 of connector A.

The signal for activating the side lights is also sent to the speedometer module E10 (pin 5, connector B).( Wiring diagram E4021 SPEEDOMETER )

Wiring diagram

Components

Component location