Pinpoint Test C: THE CONTROL ILLUMINATION IS ALWAYS ON

C1 CHECK THE OPERATION OF THE FRONT ELECTRONIC MODULE (FEM)
- Disconnect: Front Electronic Module (FEM) C201f. Yes
- Does the illumination go out?
- GO to C12.
- No : GO to C2.
C2 CHECK CIRCUIT 64S-LH5 (BU/RD) FOR A SHORT TO VOLTAGE
- Disconnect: Interior Auxiliary Junction Box C283a.
- Measure the voltage between the interior auxiliary junction box C283a-9, circuit 64S-LH5 (BU/RD), harness side and ground.
  
  Fig 1: Checking Circuit 64S-LH5 (BU/RD) For Short To Voltage
  Courtesy of FORD MOTOR CO.
- Is any voltage indicated?
- Yes : REPAIR the circuit. TEST the system for normal operation.
- No : GO to C3.
C3 CHECK THE INTERIOR AUXILIARY JUNCTION BOX FOR A SHORT TO VOLTAGE
- Disconnect: Interior Auxiliary Junction Box C283b.
- Disconnect: Interior Auxiliary Junction Box C283d.
- Measure the voltage between the interior auxiliary junction box C283a-9, circuit 64S-LH5 (BU/RD), component side and ground.
  
  Fig 2: Measuring Voltage Between Interior Auxiliary Junction Box C283A-9, Circuit 64S-Lh5 (BU/RD), Component Side And Ground
  Courtesy of FORD MOTOR CO.
- Is any voltage indicated?
- Yes : REPAIR or INSTALL a new interior auxiliary junction box. TEST the system for normal operation.
- No : If the instrument cluster and instrument panel switches remain illuminated, GO to C4.
  If the door and window switches remain illuminated, GO to C7.
C4 CHECK THE SUPPLY CIRCUIT 64S-LH4 (BU/RD) FOR A SHORT TO VOLTAGE
- Measure the voltage between the interior auxiliary junction box C283b-9, circuit 64S-LH4 (BU/RD), harness side and ground.
  
  Fig 3: Measuring Voltage Between Interior Auxiliary Junction Box C283B-9, Circuit 64S-Lh4 (BU/RD) And Ground
  Courtesy of FORD MOTOR CO.
- Is any voltage indicated?
- Yes : REPAIR the circuit. TEST the system for normal operation.
- No : GO to C5.
C5 CHECK THE ILLUMINATION SUPPLY CIRCUIT FOR A SHORT TO VOLTAGE
- Measure the voltage between the interior auxiliary junction box C283a-13, circuit 64S-LH4 (BU/RD), component side and ground.
  
  Fig 4: Measuring Voltage Between Interior Auxiliary Junction Box C283A-13, Circuit 64S-Lh4 (BU/RD), Component Side And Ground
  Courtesy of FORD MOTOR CO.
- Is any voltage indicated?
- Yes : REPAIR or INSTALL a new interior auxiliary junction box. TEST the system for normal operation.
- No : GO to C6.

C6 CHECK THE SUPPLY CIRCUITS FOR A SHORT TO VOLTAGE

Disconnect: Joint Connector 3 C224.

Measure the voltage between the joint connector 3 C224, harness side and ground as follows:

JOINT CONNECTOR 3 C224 VOLTAGE SPECIFICATIONS

Joint Connector 3	Circuit	Component
C224-16	64-LK18 (BU/RD)	Steering wheel switch
C224-12	64S-LE10 (BU/YE)	Instrument panel dimmer switch
C224-20	64S-LH26 (BU/BK)	Headlamp switch
C224-21	64S-GG25 (BU/OG)	Message center switch
C224-15	64S-LK29 (BU/RD)	Instrument cluster
C224-17	64S-LK34 (BU/BK)	Navigation audio unit
C224-14	64S-AL19 (BU/BK)	Adjustable pedal switch
C224-13	64S-LK1 (BU/RD)	Illumination supply

Is any voltage indicated?

Yes : REPAIR the circuit(s) in question for short to voltage. TEST the system for normal operation.
No : REPAIR or INSTALL a new joint connector 3.

C7 CHECK CIRCUIT 64S-LH16 (BU/WH) FOR A SHORT TO VOLTAGE
- Measure the voltage between the interior auxiliary junction box C283b-10, circuit 64S-LH16 (BU/WH), harness side and ground.
  
  Fig 5: Measuring Voltage Between Interior Auxiliary Junction Box C283B-10, Circuit 64S-Lh16 (BU/WH) And Ground
  Courtesy of FORD MOTOR CO.
- Is any voltage indicated?
- Yes : REPAIR the following circuit(s): 64S-LH16 (BU/WH), 64S-LH16A (BU/WH), or 64S-LH15 (BU) for a short to voltage. TEST the system for normal operation.
- No : GO to C8.
C8 CHECK CIRCUIT 64S-LH1 (BU/RD) FOR A SHORT TO VOLTAGE
- Measure the voltage between the interior auxiliary junction box C283b-1, circuit 64S-LH1 (BU/RD), harness side and ground.
  
  Fig 6: Measuring Voltage Between Interior Auxiliary Junction Box C283B-1, Circuit 64S-Lh1 (BU/RD) And Ground
  Courtesy of FORD MOTOR CO.
- Is any voltage indicated?
- Yes : REPAIR the following circuit(s): 64S-LH1 (BU/RD), 64S-LH14 (BU), 64S-AH27 (BU), 64S-LH28 (BU), or 64S-LH50 (BU/YE) for a short to voltage. TEST the system for normal operation.
- No : GO to C9.
C9 CHECK CIRCUIT 64S-AD2 (BU/RD) FOR A SHORT TO VOLTAGE
- Disconnect: Central Junction Box (CJB) C270d.
- Measure the voltage between the interior auxiliary junction box C283b-11, circuit 64S-AD2 (BU/RD), harness side and ground.
  
  Fig 7: Measuring Voltage Between Interior Auxiliary Junction Box C283B-11, Circuit 64S-Ad2 (BU/RD) And Ground
  Courtesy of FORD MOTOR CO.
- Is any voltage indicated?
- Yes : REPAIR the circuit. TEST the system for normal operation.
- No : GO to C10.
C10 CHECK CIRCUIT 64S-LH2 (BU/RD) FOR A SHORT TO VOLTAGE
- Measure the voltage between the CJB C270d-25, circuit 64S-LH2 (BU/RD), harness side and ground.
  
  Fig 8: Measuring Voltage Between CJB C270D-25, Circuit 64S-Lh2 (BU/RD) And Ground
  Courtesy of FORD MOTOR CO.
- Is any voltage indicated?
- Yes : REPAIR the following circuit(s): 64S-LH2 (BU/RD), 64S-LH31 (BU/RD), or 64S-LH42 (BU/RD) for a short to voltage. TEST the system for normal operation.
- No : GO to C11.
C11 CHECK CIRCUIT 64S-LH33 (BU/BK) FOR A SHORT TO VOLTAGE
- Measure the voltage between the CJB C270d-26, circuit 64S-LH33 (BU/BK), harness side and ground.
  
  Fig 9: Measuring Voltage Between CJB C270D-26, Circuit 64S-LH33 (BU/BK) And Ground
  Courtesy of FORD MOTOR CO.
- Is any voltage indicated?
- Yes : REPAIR the following circuit(s): 64S-LH33 (BU/BK), 64S-LH33A (BU/BK), or 64S-LH32 (BU/RD) for a short to voltage. TEST the system for normal operation.
- No : REPAIR or INSTALL a new CJB. TEST the system for normal operation.
C12 CHECK FOR CORRECT FEM OPERATION
- Disconnect all the FEM connectors.
- Check for:
  - corrosion
  - pushed-out pins
- Connect all the FEM 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 FEM. 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 the DTCs. REPEAT the self-test.