AC2: Check Brake System Indicator Circuit

With the ignition key in the OFF position, remove the instrument cluster. Disconnect the instrument cluster connector C1. Connect a test lamp between terminal No. 20 Gray/Blue and terminal No. 16 Yellow/Purple on the instrument cluster connector C1. See WIRING DIAGRAMS  . Turn the ignition key to the ON position. Does the test lamp illuminate? If yes, replace the instrument cluster. If no, go to the next step.