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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 297 (Lighting System) >> Diagnostic Information and Procedures >> Stop Lamps Malfunction >> Circuit/System Verification

Circuit/System Verification

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  1. Ignition ON, observe the scan tool Stop Lamp Relay Command parameter while pressing and releasing the brake pedal. The parameter should change between ON and OFF.
    • If the parameter does not change between the commanded states, refer to the Stop Lamp Switch Malfunction below.
  2. Observe the left and right stop lamps while pressing and releasing the brake pedal. The stop lamps should turn ON and OFF.
    • If the left or right stop lamps do not change between the selected states, refer to the Stop Lamp Malfunction below.
  3. Observe the center high mounted stop lamp while pressing and releasing the brake pedal. The center high mounted stop lamp should turn ON and OFF.
    • If the center high mounted stop lamp does not change between the selected states, refer to Center High Mounted Stop Lamp Malfunction below.
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