17. With the lines in place our attention was turned to the master cylinder. Step one was to crawl under the dash and unhook the pin connecting the pushrod to the brake pedal (arrow). It's held in place by a small clip that we used a small flat tip to remove. In this shot you can also see the brake light switch. If you are going to take your time doing this swap, we would recommend disconnecting the battery because once you pull the master/booster the taillights will probably come on and stay on till you get the new stuff in.