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Home >> Saab >> 2003 >> 9-3 SE, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 21 (Lighting And Signaling Systems) >> Technical description >> Brief description >> Exterior Lighting >> Brake Lights

Brake Lights

WARNING: This page is about a different car, the 2001 Saab 9-3. However, it is still accessible from the selected car via links, so may be relevant.

The brake lights are located in the rear lights and in a high-level brake light. The light source in the high-level unit consists of a number of LEDs (Light Emitting Diodes). When the brake pedal is depressed, a switch in the brake light circuit closes and the brake lights go on.

The circuits to the brake lights are monitored by TWICE and an error message is sent to the bus if the current in the circuit drops below a certain value. In the event of a fault in the circuit, SID produces an acoustic alarm signal and displays BRAKE LIGHT FAILURE.

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