9-3 Arc/Aero (9440) L4-2.0L Turbo (2.0 T) (2004)
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Tail Lamp: Description and Operation
An Overview
Parking Lights, Detailed Description
The parking lights can be lit together with main/dipped beam or by themselves. The parking lights are lit when the light switch is in position 1 if the
ignition is on. The parking lights are on in other light switch positions depending on the programming alternative selected.
The lamps in the rear light clusters are supplied PWM-regulated voltage.
The vehicle parking lights consist of the following lamps:
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One lamp (13) in each headlamp. Power is supplied to the lamps from the Underhood Electrical Centre, UEC (342).
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US only: Side marker lights (234FL/FR) in the bumper shell on both sides. Power is supplied to the lamps from the Underhood Electrical Centre,
UEC (342).
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Two lamps (13) in each rear light cluster (418RL/RH). Power is supplied to the lamps from the Rear Electrical Centre, REC (701).
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Two lamps (15) for number plate lighting. Power is supplied to the lamps from the Rear Electrical Centre, REC (701).
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 a bus message with information on
light switch position. UEC and REC use this bus message to determine if parking lights should be lit based on the programming alternative selected. For
more information on bus messages, see Parking lights, bus information.
