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Brake (Stoplight) Switch

CAUTION: When installing stoplight switch assembly into bracket, DO NOT apply more than 25 ft. lbs. (33.9 N.m) of side load pressure on harness connector terminals.
NOTE: Stoplight switch may also be referred to as cruise/shift interlock/brake shift switch, brake switch or brake switch.
  1. Install harness connectors and cruise vacuum line on stoplight switch. See Fig 1 . Fully depress brake pedal. Insert switch assembly into mounting bracket. Press switch assembly inward until no clicks are heard.
  2. Pull brake pedal rearward until no clicks are heard. Release pedal and pull it rearward again to ensure switch assembly is fully seated.
  3. When properly installed, notch in switch plunger should be visible. See Fig 1 . If assembly is not properly installed, repeat steps  1 and  2 ,
Fig 1: Installing Stoplight Switch
G91H07929Courtesy of GENERAL MOTORS CORP.