Exterior Lighting - Chevrolet Captiva Manual

TRAINING

Exterior lighting

The exteior lighing is controlled by the BCM and
consists of the following lamps:
Headlamps
●
Fog lamps
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Parking lamps
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Tail lamps
●
License plate lamps
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Turn signal lamps
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Stop lamps
●
Backup lamps
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The auto light is an optional feature. When fitted,
the light switch is different.
Automatic Lamp control
On vehicles with Automatic Lamp Control (ALC)
the headlamps can be switched ON in two differ-
ent ways. First, when the driver places the head-
lamp switch in the HEADLAMP position, for
mormal operation. Second, with the headlamp
switch placed in the AUTO position, for ALC.
Headlamp ON/OFF control is determined by the
Body Control Module (BCM). It uses the signals of
the headlamp switch. When the headlamp switch
is in the AUTO position, the BCM determines head-
lamps ON/OFF by the voltage from the ambient
light sensor.
Ambient Light Sensor
The Ambient Light Sensor is a light-sensitive tran-
sistor that varies its voltage signal to the Body
Control Module (BCM) in response to the changes
in the outside (ambient) light level.
When the BCM receives this signal, the BCM
switches ON the low beam headlamps and the
exterior lamps for Automatic Lamp Control (ALC).
The ambient light sensor is located in the ins-
tument panel centre speaker grille.
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Electrical
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Daytime Running Lights
Daytime Running Lights (DRL) is an optional availa-
ble feature. DRL illuminate automatically when the
engine is started. DRL will turn OFF under the fol-
lowing conditions:
– Engine is stopped
– Parking lamps switched ON
– Low-beam lamps switched ON
Interior lighting
The interior lighting consists of dimming and non-
dimming lamps.
The interior lamps which cannot be dimmed are
courtsey lamps such as the door step, glove box
and rear compartment lamps.
Those which can be dimmed make use of a combi-
nation of LED's and bulbs. The voltage signal from
the dimmer switch is outputted to the BCM, which
in turn provides the correct voltage to the various
LED's and bulbs.
The dimmer switch is located in the mirror control
switch assembly next to the steering column.