Pinpoint Test A : All DIMMABLE Illumination Does Not Dim

A1 CHECK THE RECORDED RESULTS FROM THE SCCM ON-DEMAND SELF-TEST
- Ignition OFF.
- Using a scan tool, perform the SCCM self-test.
Is DTC B1124:09 present?

Yes GO to A2.

No GO to A4.

A2 CHECK THE INSTRUMENT PANEL DIMMER SWITCH

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 .

A3 CHECK THE INSTRUMENT PANEL DIMMER SWITCH INPUT CIRCUITS FOR A SHORT TO GROUND

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	CLN55 (YE/VT)	-	Ground
C2065-7	CLN56 (BN/VT)	-	Ground

Courtesy of FORD MOTOR COMPANY

Are the resistances greater than 10, 000 ohms?

Yes	GO to A9.
No	REPAIR the affected circuit.

A4 CHECK THE INSTRUMENT PANEL DIMMER SWITCH

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 .

A5 CHECK THE INSTRUMENT PANEL DIMMER SWITCH UP AND DOWN INPUT CIRCUITS FOR VOLTAGE

Ignition ON.

Measure the voltage between:

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

Courtesy of FORD MOTOR COMPANY

Are the voltages approximately 5 volts?

Yes	GO to A7.
No	GO to A6.

A6 CHECK THE INSTRUMENT PANEL DIMMER SWITCH UP AND DOWN INPUT CIRCUITS FOR AN OPEN

Ignition OFF.

Disconnect: SCCM C2414A .

Measure the resistance between:

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

Courtesy of FORD MOTOR COMPANY

Are the resistances less than 3 ohms?

Yes	GO to A9.
No	REPAIR the affected circuit.

A7 CHECK THE INSTRUMENT PANEL DIMMER SWITCH INPUT AND RETURN CIRCUITS FOR A SHORT TO VOLTAGE

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	CLN55 (YE/VT)	-	Ground
C2065-7	CLN56 (BN/VT)	-	Ground

Courtesy of FORD MOTOR COMPANY

Is any voltage present?

Yes	REPAIR the affected circuit.
No	GO to A8.

A8 CHECK THE INSTRUMENT PANEL DIMMER SWITCH RETURN CIRCUIT FOR AN OPEN

Ignition OFF.

Measure the resistance between:

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

Courtesy of FORD MOTOR COMPANY

Is the resistance less than 3 ohms?

Yes	GO to A9.
No	REPAIR the circuit.

A9 CHECK THE INSTRUMENT PANEL DIMMER SWITCH INPUT AND RETURN CIRCUITS FOR A SHORT TOGETHER

Measure the resistance between:

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

Courtesy of FORD MOTOR COMPANY

Are the resistances greater than 10, 000 ohms?

Yes	GO to A10.
No	REPAIR the affected circuits.

A10 CHECK FOR CORRECT SCCM OPERATION

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.

Yes	GO to A2.
No	GO to A4.