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Home >> Saab >> 2011 >> 9-5 Turbo6 >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Exterior Lights >> Lighting And Signaling Systems >> Fault diagnosis, fault codes >> DTC B2610: Passenger Compartment Dimming 1 Circuit Short to Ground >> Circuit/System Description

Circuit/System Description

The body control module (BCM) supplies a reference voltage to the backlight dimmer switch, which is part of the headlamp switch. When the backlight dimmer switch is placed in a desired brightness position, reference voltage is applied through the backlight dimmer switch rheostat to the BCM. The BCM interprets this voltage signal, then applies a pulse width modulated (PWM) voltage through the backlight lamp control circuit, and the LED dimming control circuit illuminating the LEDs and the components listed below, if equipped:

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