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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 B: Gearshift Lever Does Not Move With Brake Pedal Depressed (Column Shift)

Test B: Gearshift Lever Does Not Move With Brake Pedal Depressed (Column 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  5. If not, go to next step.
  4. Turn the ignition switch to the OFF position. Disconnect the shift lock solenoid. See SHIFT LOCK SOLENOID (COLUMN SHIFT)  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  7. If not, go to step  6.
  5. Inspect the stoplamp switch for poor connections. Did you find and correct the condition? If so, go to step  10. If not, go to step  8.
  6. Inspect the shift lock solenoid for poor connections. Did you find and correct the condition? If so, go to step  10. If not, go to step  9.
  7. Repair the short to voltage in the shift lock solenoid voltage supply circuit (Dark Green/White wire). After repairs, go to step  10.
  8. Replace the stoplamp switch. See STOPLAMP SWITCH  under REMOVAL & INSTALLATION. After repairs, go to step  10.
  9. Replace the shift lock solenoid. See SHIFT LOCK SOLENOID (COLUMN SHIFT)  under REMOVAL & INSTALLATION. After repairs, go to next step.
  10. 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.