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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 E: Gearshift Lever Can Be Moved Without Brake Pedal Depressed (Floor Shift)

Test E: Gearshift Lever Can Be Moved Without 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. Apply the parking brake and block the wheels. Turn the ignition switch to the ON position. 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 next step. If not, condition is intermittent. See SYMPTOM DIAGNOSIS  under TROUBLE SHOOTING.
  3. Place gearshift lever in the Park position. Turn the ignition switch to the OFF 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, see TEST A: PARK LOCK SOLENOID INOPERATIVE (FLOOR SHIFT) . If not, go to next step.
  4. Connect a test light between ground and the stoplamp switch voltage supply circuit (Light Green/Black wire). Does the test light illuminate? If so, go to next step. If not, go to step  10.
  5. Connect a test light between ground and the stoplamp switch output circuit (Dark Green/White wire). Press and release the brake pedal several times. Does the test light turn ON and OFF with the brake pedal? If so, go to next step. If not, go to step  8.
  6. Connect a test light between ground and the voltage supply circuit (Dark Green/White wire) at the shift lock solenoid. Does the test light illuminate? If so, go to next step. If not, go to step  11.
  7. Test the shift lock solenoid ground circuit (Black wire) for an open or high resistance. Did you find and correct the condition? If so, go to step  14. If not, go to step  9.
  8. Inspect the stoplamp switch for poor connections. Did you find and correct the condition? If so, go to step  14. If not, go to step  12.
  9. Inspect the shift lock solenoid for poor connections. Did you find and correct the condition? If so, go to step  14. If not, go to step  13.
  10. Repair the open or short in the stoplamp switch voltage supply circuit (Light Green/Black wire). After repairs, go to step  14.
  11. Repair the open in the shift lock solenoid voltage supply circuit (Dark Green/White wire). After repairs, go to step  14.
  12. Replace the stoplamp switch. See STOPLAMP SWITCH  under REMOVAL & INSTALLATION. After repairs, go to step  14.
  13. Replace the shift lock solenoid. See FLOOR SHIFT CONTROL  under REMOVAL & INSTALLATION.
  14. 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.
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