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"K" Body (Deville)

  1. Disconnect BTSI switch. Turn ignition switch to ON position. Press and hold brake pedal. Attempt to move gearshift lever out of Park position. If gearshift lever moves out of Park position, go to step  3. If gearshift lever does not move out of Park position, go to next step.
  2. Check BTSI signal circuit for a short to voltage. See WIRING DIAGRAMS . Repair as necessary. If condition was corrected, go to step  7. If condition was not corrected, go to step  5.
  3. Inspect brakelight switch for proper adjustment. Inspect for poor connections at brakelight switch connector. Repair as necessary. If condition was corrected, go to step  7. If condition was not corrected, go to next step.
  4. Replace brakelight switch, then go to step  7.
  5. Inspect BTSI solenoid for proper adjustment and free of mechanical movement. Inspect for poor connections at BTSI solenoid connector. See WIRING DIAGRAMS . Repair as necessary. If condition was corrected, go to  7. If condition was not corrected, go to next step.
  6. Replace BTSI solenoid, then go to next step.
  7. Ensure all components disconnected or removed during testing are reconnected and installed on vehicle. Ensure BTSI system operates correctly. See SHIFT INTERLOCK SOLENOID  under DESCRIPTION & OPERATION. If system does not operate correctly, repeat step  1.
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