Dipped beam, detailed description: Notes

Dipped beam is lit when the light switch (10) is in position 2 and the ignition is on. The power supply to the dipped beam lamps is governed by the Underhood Electrical Center (342). Dipped beam is used as daytime running lights in certain markets (light switch in position 0 or 1).

Fig 1: Dipped Beam

Courtesy of SAAB-SCANIA OF AMERICA, INC.

BCM (707) uses pins A29 and A30 to determine which position is set. BCM (707) pin A29 is connected to light switch pin 4, which corresponds to position 0. BCM (707) pin A30 is connected to light switch pin 2, which corresponds to position 2.

BCM (707) sends the bus messages "Dipped beam, button active ON", which is used by the fuse box in the engine bay (342). B+ voltage is supplied from fuse box pins 25 and 16 to headlamp pin 3.