Pinpoint Test L: The STOPLAMPS Are On Continuously

L1 DETERMINE IF ALL STOPLAMPS ARE ILLUMINATED
- Observe the operation of the stoplamps with the brake pedal released.
- Are all of the stoplamps illuminated?
- Yes : GO to L2.
- No : GO to L6.
L2 CHECK THE STOPLAMP SWITCH
- Key in OFF position.
- Disconnect: Stoplamp Switch C278.
- Do the stoplamps continue to illuminate?
- Yes : GO to L3.
- No : INSTALL a new stoplamp switch. REFER to STOPLAMP SWITCH . TEST the system for normal operation.
L3 CHECK THE POWERTRAIN CONTROL MODULE (PCM)
- Disconnect: PCM C175b.
- Do the stoplamps continue to illuminate?
- Yes : GO to L4.
- No : GO to L7.
L4 CHECK THE ANTI-LOCK BRAKE SYSTEM (ABS) MODULE
- Disconnect: ABS Module C155.
- Do the stoplamps continue to illuminate?
- Yes : If equipped with speed control, GO to L5.
  If not equipped with speed control, GO to L6.
- No : GO to L8.
L5 CHECK THE SPEED CONTROL MODULE
- Disconnect: Speed Control Module C122.
- Do the stoplamps continue to illuminate?
- Yes : GO to L6.
- No : GO to L9.
L6 CHECK THE SMART JUNCTION BOX (SJB)
- Disconnect: SJB C2280c.
- Do the stoplamps continue to illuminate?
- Yes : If the high mounted stoplamp continues to illuminate, REPAIR circuit 511 (LG). CLEAR any DTCs. TEST the system for normal operation.
  If the LH rear lamp continues to illuminate, REPAIR circuit 22 (LB/BK). CLEAR any DTCs. TEST the system for normal operation.
- No : GO to L10.
L7 CHECK FOR CORRECT PCM OPERATION
- Disconnect all the PCM connectors.
- Check for:
  - corrosion
  - pushed-out pins
- Connect all the PCM connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
- Yes : INSTALL a new PCM. REFER to ELECTRONIC ENGINE CONTROLS - 2.3L or ELECTRONIC ENGINE CONTROLS - 3.0L (4V) . TEST the system for normal operation.
- No : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR any DTCs. REPEAT the self-test.
L8 CHECK FOR CORRECT ABS MODULE OPERATION
- Disconnect the ABS module connector.
- Check for:
  - corrosion
  - pushed-out pins
- Connect the ABS module connector and make sure it seats correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
- Yes : INSTALL a new ABS module. REFER to ANTI-LOCK CONTROL . TEST the system for normal operation.
- No : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR any DTCs. REPEAT the self-test.
L9 CHECK FOR CORRECT SPEED CONTROL MODULE OPERATION
- Disconnect the speed control module connector.
- Check for:
  - corrosion
  - pushed-out pins
- Connect the speed control module connector and make sure it seats correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
- Yes : INSTALL a new speed control module. REFER to SPEED CONTROL . TEST the system for normal operation.
- No : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR any DTCs. REPEAT the self-test.
L10 CHECK FOR CORRECT SJB OPERATION
- Disconnect all the SJB connectors.
- Check for:
  - corrosion
  - pushed-out pins
- Connect all the SJB connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
- Yes : INSTALL a new SJB. REFER to MULTIFUNCTION ELECTRONIC MODULES . TEST the system for normal operation.
- No : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR any DTCs. REPEAT the self-test.