Stop Lamp Switch
WARNING: This page is about a different car, the 2010 Volvo V70, 2009 Volvo V70, and 2008 Volvo V70. However, it is still accessible from the selected car via links, so may be relevant.
The brake light switch is located with the brake pedal. The switch is closed in its home position but opens when the brake pedal is depressed. The switch indicates that the brake pedal has been depressed and is used during brake light diagnostics and when deactivating cruise control.