Pinpoint Test C: All DIMMABLE Switch Illumination Is Inoperative

NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

C1 CHECK FOR RECORDED SJB DTCs FROM THE ON-DEMAND SELF-TEST
- Use the recorded results from the SJB self-test.
- Is DTC B2A32 present?
  - YES: GO to C2 .
  - NO: VERIFY the SJB fuse 10 (15A) is OK. If OK, GO to C2 .
  If not OK, REFER to the SYSTEM WIRING DIAGRAMS article to identify the possible causes of the circuit short. After the repair:
  
  If no DTCs are present, TEST the system for normal operation.
  
  If DTC B106E is present, CLEAR the DTCs and REPEAT the self-test (required to enable the backlighting output driver if DTC B106E is present) . TEST the system for normal operation.
  
  If DTC B106F is present, INSTALL a new SJB . REFER to MULTIFUNCTION ELECTRONIC MODULE article. TEST the system for normal operation.
C2 BYPASS THE SJB
NOTE: If the jumper wire fails, refer to the SYSTEM WIRING DIAGRAMS article to identify the possible causes of the circuit short. After the repair:

If no DTCs are present, test the system for normal operation.

If DTC B106E is present, Clear the DTCs and repeat the self-test (required to enable the backlighting output driver if DTC B106E is present) . TEST the system for normal operation.

If DTC B106F is present, install a new SJB . Refer to MULTIFUNCTION ELECTRONIC MODULE article. TEST the system for normal operation.
Ignition OFF.
Disconnect: SJB C2280b.
Connect a fused jumper wire between the SJB C2280b-39, circuit VLN04 (VT/GY), harness side and battery positive.

Fig 1: Connecting Fused Jumper Wire Between C2280b-39, Circuit VLN04 (VT/GY) And Battery Positive
Courtesy of FORD MOTOR CO.
Do the backlighting components illuminate?
- YES: REMOVE the jumper wire. GO to C3 .
- NO: REMOVE the jumper wire. REPAIR circuit VLN04 (VT/GY) for an open. REPEAT the self-test.
C3 CHECK FOR CORRECT SJB OPERATION
- Disconnect all the SJB connectors.
- Check for:
  - corrosion
  - damaged pins
  - 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 MODULE article. 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.