hey zakh, the brake light switch is near the top of the brake pedal. Take a flashlight with you It has a connector and also has a plunger that is engaged when the brake pedal is pressed. You have to twist it to disengage it from its mount, unplug the connector. Its about the size of a tic tac container. Its a cheap part and it can cause the asd light to come on, I have spoken and read the posts of a few europeans who have asd and this switch is one of the things they replace first when diagnosing asd. The plunger gets stuck and doesn't rebound properely.