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

L1 CHECK THE LIGHTING CONTROL MODULE (LCM) OPERATION
- Key in OFF position.
- Disconnect: LCM C2145a.
- Key in ON position.
- Is the traction control switch indicator illuminated?
- Yes : GO to L2.
- No : GO to L3.
L2 CHECK CIRCUIT 939 (VT) FOR A SHORT TO VOLTAGE
- Key in OFF position.
- Disconnect: Traction Control Switch C280.
- Key in ON position.
- Measure the voltage between the traction control switch C280 pin 4, circuit 939 (VT), harness side and ground.
  
  Fig 1: Measuring Voltage Between Traction Control Switch C280 Pin 4, Circuit 939 (VT), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is any voltage present?
- Yes : REPAIR the circuit. TEST the system for normal operation.
- No : INSTALL a new traction control switch. TEST the system for normal operation.
L3 CHECK FOR CORRECT LCM OPERATION
- Disconnect all the LCM connectors.
- Check for:
  - corrosion
  - pushed-out pins
- Connect all the LCM connectors and make sure they seated correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
- Yes : INSTALL a new LCM module. 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. CARRY OUT the self-test with the brake pedal not applied.