GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Oldsmobile 🢒 1998 🢒 Aurora 🢒 Brakes 🢒 Hydraulic Brakes 🢒 Stop Lamp Switch Replacement

Removal Procedure
  1. Remove the lefthand IP sound insulator.

    2. Object Number: 177398 Size: SH
  2. Disconnect the stoplamp/BTSI switch.
  3. Disconnect the TCC. ABS switch.
  4. Twist the switch (2) counterclockwise to unlock and pull out of the retainer.
  5. Remove the electrical connectors (3) from the switch.

Installation Procedure

    Notice: Do not push or pull on the brake pedal while installing the brake switches or installing the brake switches or damage to the brake system and/or switch may occur.

    Notice: Do not side load the brake switches during installation or damage to the brake system and/or switches may occur.

    Important: Make all connections before installing. Be sure all connectors are firmly seized and locked.


    Object Number: 177398 Size: SH
  1. Install the TCC/ABS Switch (2).
  2. Slide the switch (2) (with all connections (3) made) into the retainer.
  3. Press the switch in until the switch plunger is fully depressed into the switch barrel.
  4. Twist the switch clockwise until the travel stop has been reached (approximately 60 degrees).
  5. With the switch fully locked, the electrical connector will face the 3 o'clock position.
  6. Install the lefthand IP sound insulator.