Brake Lamp: Description and Operation

Pin 2 of brake lights switch 29 is supplied with current via fuse 12.

When the switch is actuated, brake lights 30 receive current via the Integrated Central Electronics (ICE) control module.

The brake lights on a trailer, if any, are supplied with current direct from the brake lights switch via connector 258 (H8-5).

The ICE control module monitors the light bulbs and sends a signal to pin 8 of the SID unit which lights up the "DEFECTIVE LAMP" indicator lamp or the INFO DISPL lamp in the main instrument display panel at the same time as a message is displayed in the SID unit.

On cars for certain markets the SID unit displays a message telling the driver to test the brake lights immediately after switching on the ignition.

The ICE control module also monitors the high-level brake light and senses when more than two light bulbs are defective.