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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Shift Interlock Systems >> Symptom Tests >> Test C: Gearshift Lever Does Not Move With Brake Pedal Depressed (Floor Shift)

Test C: Gearshift Lever Does Not Move With Brake Pedal Depressed (Floor Shift)

NOTE: For circuit reference, see CONNECTOR IDENTIFICATION  and WIRING DIAGRAMS  .
  1. Did you review the DESCRIPTION and OPERATION and perform the necessary inspections? If so, go to next step. If not, see DESCRIPTION & OPERATION .
  2. Turn ignition switch to the ON position. Depress the brake pedal. Attempt to move the gearshift lever out of the Park position. Does the gearshift lever move out of the Park position? If so, check for an intermittent condition. See SYMPTOM DIAGNOSIS  under TROUBLE SHOOTING. If not, go to next step.
  3. Turn the ignition switch to the OFF position. Disconnect the stoplamp switch. Turn the ignition switch to the ON position. Press and hold the brake pedal. Attempt to move the gearshift lever out of the Park position. Does the gearshift lever move out of the Park position? If so, go to step  10. If not, go to next step.
  4. Turn the ignition switch to the OFF position. Disconnect the shift lock solenoid. See FLOOR SHIFT CONTROL  under REMOVAL & INSTALLATION. Turn the ignition switch to the ON position. Press and hold the brake pedal. Attempt to move the gearshift lever out of the Park position. Does the gearshift lever move out of the Park position? If so, go to step  13. If not, go to next step.
  5. Turn the ignition switch to the OFF position. Connect a test light between ground and the stoplamp switch voltage supply circuit (Light Green/Black wire) at the park lock solenoid. See STEERING COLUMN PARK LOCK SOLENOID (FLOOR SHIFT)  under REMOVAL & INSTALLATION. Turn the ignition switch to the ON position. Does the test light illuminate? If so, go to next step. If not, go to step  7.
  6. Turn the ignition switch to the OFF position. Connect a test light between the stoplamp switch voltage supply circuit (Light Green/Black wire) and the ground circuit (Black wire) at the park lock solenoid. Turn the ignition switch to the ON position. Does the test light illuminate? If so, go to step  11. If not, go to step  14.
  7. Turn the ignition switch to the OFF position. Connect a test light between ground and the PNP switch park signal circuit (Light Green wire) at the BTSI fuse. Turn the ignition switch to the ON position. Does the test light illuminate? If so, go to step  15. If not, go to next step.
  8. Turn the ignition switch to the OFF position. Connect a test light between ground and the ignition feed circuit (Pink wire) at the PNP switch. Turn the ignition switch to the ON position. Does the test light illuminate? If so, go to next step. If not go to step  16.
  9. Turn the ignition switch to the OFF position. Connect a test light between ground and the park signal circuit (Light Green wire) at the PNP switch. Turn the ignition switch to the ON position. Does the test light illuminate? If so, go to step  17. If not, go to step  12.
  10. Inspect the stoplamp switch for poor connections. Did you find and correct the condition? If so, go to step  21. If not, go to step  18.
  11. Inspect the shift lock solenoid for poor connections. Did you find and correct the condition? If so, go to step  21. If not go to step  19.
  12. Inspect for proper PNP switch adjustment. See appropriate AUTOMATIC article in AUTOMATIC TRANSMISSIONS. Inspect the PNP switch for poor connections. Did you find and correct the condition? If so, go to step  21. If not, go to step  20.
  13. Repair the short to voltage in the shift lock solenoid voltage supply circuit (Dark Green/White wire). After repairs, go to step  21.
  14. Repair the open in the shift lock solenoid ground circuit (Black wire). After repairs, go to step  21.
  15. Repair the open in the stoplamp switch voltage supply circuit (Light Green/Black wire). After repairs, go to step  21.
  16. Repair the open in the PNP switch ignition feed circuit (Pink wire). After repairs, go to step  21.
  17. Repair the open in the PNP switch park signal circuit (Light Green wire). After repairs, go to step  21.
  18. Replace the stoplamp switch. See STOPLAMP SWITCH  under REMOVAL & INSTALLATION. After repairs, go to step  21.
  19. Replace the shift lock solenoid assembly. See FLOOR SHIFT CONTROL  under REMOVAL & INSTALLATION. After repairs, go to step  21.
  20. Replace the PNP switch. See appropriate AUTOMATIC article in AUTOMATIC TRANSMISSIONS. After repairs, go to next step.
  21. Operate the system in order to verify the repair. Did you find and correct the condition? If so, system is okay. If not, go to step  2.