Pinpoint Test K: The Traction Control Indicator Is Inoperative-Traction Control Switch

Test Step 

1. K1 CHECK CIRCUIT 960 (BK/LB) 
   • Key in OFF position.
   • Disconnect: Instrument Cluster C220b.
   • Disconnect: Traction Control Switch C239.
   • Measure the resistance between instrument cluster C220b pin 8, circuit 960 (BK/LB), harness side and traction control switch C239 pin 5, circuit 960 (BK/LB), harness side; and between instrument cluster C220b pin 8, circuit 960 (BK/LB), harness side and ground.
     Fig 1: Checking Circuit 960 (BK/LB)

     Courtesy of FORD MOTOR CO.
   • Is the resistance less than 5 ohms between the instrument cluster and traction control switch; and greater than 10,000 ohms between instrument cluster and ground? 

   Result / Action to Take 

   1. Yes:  GO to K2.
   2. No:  REPAIR the circuit. TEST the system for normal operation.
2. K2 CHECK CIRCUIT 489 (PK/BK) FOR AN OPEN 
   • Key in ON position.
   • Measure the voltage between traction control switch C239 pin 3, circuit 489 (PK/BK), harness side and ground.
     Fig 2: Checking Circuit 489 (PK/BK) For An Open

     Courtesy of FORD MOTOR CO.
   • Is the voltage greater than 10 volts? 
   1. Yes:  GO to K3.
   2. No:  REPAIR the circuit. TEST the system for normal operation.
3. K3 CHECK THE TRACTION CONTROL SWITCH INDICATOR 
   • Key in OFF position.
   • Connect: Traction Control Switch C239.
   • Key in ON position.
   • Momentarily connect a fused (10A) jumper wire between instrument cluster C220b pin 8, circuit 960 (BK/LB), harness side and ground, while observing the traction control switch indicator.
     Fig 3: Checking Traction Control Switch Indicator

     Courtesy of FORD MOTOR CO.
   • Does the traction control switch indicator illuminate? 
   1. Yes:  INSTALL a new instrument cluster. REFER to HORN . TEST the system for normal operation.
   2. No:  INSTALL a new traction control switch. TEST the system for normal operation.