Pinpoint Test A: All DIMMABLE Illumination Does Not Dim

• Ignition OFF.
• Using a scan tool, perform the SCCM self-test.

Is DTC B1124:09 present? 

• Yes  : GO to A2  .
• No  : GO to  A4.

• Disconnect: Instrument Panel Dimmer Switch C2065  .
• Ignition ON.
• Using a scan tool, clear the DTCs and perform the SCCM self-test.

Is DTC B1124:09 still present? 

• Yes  : GO to A3  .
• No  : INSTALL a new instrument panel dimmer switch. REFER to INSTRUMENT PANEL DIMMER SWITCH .

• Ignition OFF.
• Disconnect: SCCM C2414A  .
• Measure the resistance  between:

  Positive Lead		Negative Lead
  Pin	Circuit	Pin	Circuit
  C2065-2	VLN36 (GY/OG)	-	Ground
  C2065-3	CLN56 (BN/VT)	-	Ground
  C2065-7	CLN55 (YE/VT)	-	Ground

• Fig 1: Identifying SCCM Connector Pin

  Courtesy of FORD MOTOR CO.

• Disconnect: Instrument Panel Dimmer Switch C2065  .
• Carry out the instrument panel dimmer switch component test.

  Refer to OEM WIRING DIAGRAMS COMPONENT TESTING for component testing.

Is the instrument panel dimmer switch OK? 

• Yes  : GO to A5  .
• No  : INSTALL a new instrument panel dimmer switch. REFER to INSTRUMENT PANEL DIMMER SWITCH .

• Ignition ON.
• Measure the voltage  between:

  Positive Lead		Negative Lead
  Pin	Circuit	Pin	Circuit
  C2065-3	CLN56 (BN/VT)	-	Ground
  C2065-7	CLN55 (YE/VT)	-	Ground

• Fig 2: Identifying Instrument Panel Dimmer Switch Connector Pin

  Courtesy of FORD MOTOR CO.

• Ignition OFF.
• Disconnect: SCCM C2414A  .
• Measure the resistance  between:

  Positive Lead		Negative Lead
  Pin	Circuit	Pin	Circuit
  C2414A-17	CLN56 (BN/VT)	C2065-3	CLN56 (BN/VT)
  C2414A-18	CLN55 (YE/VT)	C2065-7	CLN55 (YE/VT)

Fig 3: Identifying SCCM Connector Pin
Courtesy of FORD MOTOR CO.

Are the resistances less than 3 ohms? 

• Yes  : GO to  A9.
• No  : REPAIR the affected circuit.

• Ignition OFF.
• Disconnect: SCCM C2414A  .
• Ignition ON.
• Measure the voltage  between:

  Positive Lead		Negative Lead
  Pin	Circuit	Pin	Circuit
  C2065-2	VLN36 (GY/OG)	-	Ground
  C2065-3	CLN56 (BN/VT)	-	Ground
  C2065-4	RLN29 (WH/OG)	-	Ground
  C2065-7	CLN55 (YE/VT)	-	Ground

Fig 4: Identifying SCCM Connector Pin
Courtesy of FORD MOTOR CO.

• Ignition OFF.
• Measure the resistance  between:

  Positive Lead		Negative Lead
  Pin	Circuit	Pin	Circuit
  C2414A-15	RLN29 (WH/OG)	C2065-4	RLN29 (WH/OG)

Fig 5: Identifying SCCM Connector Pin
Courtesy of FORD MOTOR CO.

Is the resistance less than 3 ohms? 

• Yes  : GO to A9  .
• No  : REPAIR the circuit.

• Measure the resistance  between:

  Positive Lead		Negative Lead
  Pin	Circuit	Pin	Circuit
  C2065-2	VLN36 (GY/OG)	C2065-3	CLN56 (BN/VT)
  C2065-2	VLN36 (GY/OG)	C2065-4	RLN29 (WH/OG)
  C2065-2	VLN36 (GY/OG)	C2065-7	CLN55 (YE/VT)
  C2065-3	CLN56 (BN/VT)	C2065-4	RLN29 (WH/OG)
  C2065-3	CLN56 (BN/VT)	C2065-7	CLN55 (YE/VT)
  C2065-4	RLN29 (WH/OG)	C2065-7	CLN55 (YE/VT)

Fig 6: Identifying SCCM Connector Pin
Courtesy of FORD MOTOR CO.

• Disconnect and inspect all the SCCM connectors.
• Repair:
  • corrosion (install new connector or terminals - clean module pins)
  • damaged or bent pins - install new terminals/pins
  • pushed-out pins - install new pins as necessary
• Reconnect the SCCM connectors. Make sure they seat and latch correctly.
• Operate the system and determine if the concern is still present.

Is the concern still present? 

• Yes  : CHECK On-Line Automotive Service Information System (OASIS) for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new SCCM. REFER to STEERING COLUMN SWITCHES .
• No  : The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.