These universal switches allow rearset users to operate the rear brake light. This all-in-one unit replaces the banjo bolt that connects the rear master cylinder to the rear brake line. You simply replace the bolt with this assembly and splice the wires into your existing brake light switch. The pressure inside your brake system then activates the brake light. Allows rearset users to operate the rear brake light. Replaces the banjo bolt that connects the rear master cylinder to the rear brake line. Notes: Installation requires the disconnection of the battery terminals as well as unplugging and removing the O.E.M. brake pressure switch. Color of plastic collar and connector may vary.