Pinpoint Test L: The Traction Control Switch Indicator Is Always On

L1 CHECK THE POWERTRAIN CONTROL MODULE (PCM) OUTPUT
- Key in OFF position.
- Disconnect: PCM C175b.
- Key in ON position.
- Does the traction control switch indicator continue to illuminate?
- Yes : GO to L2.
- No : GO to L7.
L2 CHECK THE LIGHTING CONTROL MODULE (LCM) OUTPUT
- Key in OFF position.
- Disconnect: LCM C2145b.
- Key in ON position.
- Does the traction control switch indicator continue to illuminate?
- Yes : GO to L5.
- No : GO to L3.
L3 CHECK CIRCUIT 960 (BK/LB) FOR A SHORT TO VOLTAGE
- Measure the voltage between the LCM C2145b pin 1, circuit 960 (BK/LB), harness side and ground.
  
  Fig 1: Measuring Voltage Between LCM C2145B Pin 1, Circuit 960 (BK/LB), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is any voltage present?
- Yes : REPAIR the circuit. TEST the system for normal operation.
- No : GO to L4.
L4 CHECK CIRCUIT 960 (BK/LB) FOR A SHORT TO GROUND
- Key in OFF position.
- Measure the resistance between the LCM C2145b pin 1, circuit 960 (BK/LB), harness side and ground.
  
  Fig 2: Measuring Resistance Between LCM C2145B Pin 1, Circuit 960 (BK/LB), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance greater than 10,000 ohms?
- Yes : GO to L6.
- No : REPAIR the circuit. TEST the system for normal operation.
L5 CHECK CIRCUIT 961 (WH/PK) FOR A SHORT TO VOLTAGE
- Measure the voltage between the LCM C2145b pin 2, circuit 961 (WH/PK), harness side and ground.
  
  Fig 3: Measuring Voltage Between LCM C2145B Pin 2, Circuit 961 (WH/PK), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is any voltage present?
- Yes : REPAIR the circuit. TEST the system for normal operation.
- No : GO to L6.
L6 CHECK FOR CORRECT LIGHTING CONTROL MODULE (LCM) OPERATION
- Disconnect all the LCM connectors.
- Check for:
  - corrosion
  - pushed-out pins
- Connect all the LCM 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 LCM. REFER to MULTIFUNCTION ELECTRONIC MODULES . CLEAR the DTCs. REPEAT the self-test.
- No : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.
L7 CHECK FOR CORRECT POWERTRAIN CONTROL MODULE (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 . CLEAR the DTCs. REPEAT the self-test.
- No : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.