Pinpoint Test G : The LH (Left-Hand) Rear Window Control Switch Illumination Is Inoperative Or Always On

Refer to Power Windows for schematic and connector information.

Normal Operation and Fault Conditions

REFER to: Instrument Panel and Interior Switches Illumination - System Operation and Component Description .

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Condition
DDM B12FF:11	Rear Door Switch Illumination: Circuit Short To Ground	This DTC sets on-demand and in continuous memory when the DDM detects a short to ground on the rear switch illumination output circuit.
DDM B12FF:15	Rear Door Switch Illumination: Circuit Short To Battery Or Open	This DTC sets on-demand and in continuous memory when the DDM detects an open or a short to voltage on the rear switch illumination output circuit.

Possible Sources

Communication network concern
Wiring, terminals or connectors
LH rear window control switch
DDM

G1 PERFORM A NETWORK TEST
- Ignition ON.
- Perform a network test.
Does the DDM pass the network test?

Yes GO to G2

No DIAGNOSE a concern with the network. REFER to: Communications Network .

G2 VERIFY THE LH (LEFT-HAND) REAR POWER WINDOW CONTROL SWITCH FUNCTIONALITY
- Ignition ON.
- Actuate the LH rear power window from the rear window control switch.
Does the LH rear window operate normally?

Yes If the switch illumination is always on, GO to G3 If the switch illumination is inoperative, GO to G6

No REFER to: Glass, Frames and Mechanisms - Vehicles With: One-Touch Open and Close Front Windows .

G3 CHECK THE ILLUMINATION CIRCUIT FOR A SHORT TO VOLTAGE

Place the headlamp switch in the OFF position.

Ignition OFF.

Disconnect LH Rear Window Control Switch C719.

Ignition ON.

Make sure all other illuminated switches inside the vehicle have turned OFF before continuing.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C719-4	Courtesy of FORD MOTOR COMPANY	Ground

Is any voltage present?

Yes

GO to G4

No	INSTALL new window control switch. REFER to: Rear Door Window Control Switch .

G4 CHECK THE ILLUMINATION CIRCUIT FOR A SHORT TO VOLTAGE WITH THE DDM (DRIVER DOOR MODULE) DISCONNECTED

Ignition OFF.

Disconnect DDM C501B.

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C719-4	Courtesy of FORD MOTOR COMPANY	Ground

Is any voltage present?

Yes	REPAIR the circuit.

GO to G5

G5 CHECK THE SWITCH CIRCUITS FOR A SHORT TOGETHER

Ignition OFF.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C719-4	Courtesy of FORD MOTOR COMPANY	C719-2
C719-4	Courtesy of FORD MOTOR COMPANY	C719-3
C719-4	Courtesy of FORD MOTOR COMPANY	C719-6

Are the resistances greater than 10, 000 ohms?

Yes

GO to G11

No	REPAIR the affected circuit.

G6 CHECK THE WINDOW CONTROL SWITCH ILLUMINATION CIRCUIT FOR VOLTAGE

Ignition OFF.

Disconnect LH Rear Window Control Switch C719.

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C719-4	Courtesy of FORD MOTOR COMPANY	Ground

Is the voltage greater than 10 volts?

Yes

GO to G9

GO to G7

G7 CHECK THE WINDOW CONTROL SWITCH ILLUMINATION CIRCUIT FOR A SHORT TO GROUND

Ignition OFF.

Disconnect DDM C501B.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C719-4	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance greater than 10, 000 ohms?

Yes

GO to G8

No	Repair the circuit.

G8 CHECK THE WINDOW CONTROL SWITCH ILLUMINATION CIRCUIT FOR AN OPEN

Measure:

Positive Lead	Measurement / Action	Negative Lead
C719-4	Courtesy of FORD MOTOR COMPANY	C501B-12

Is the resistance less than 3 ohms?

Yes

GO to G11

No	Repair the circuit.

G9 CHECK THE ILLUMINATION GROUND CIRCUIT FOR AN OPEN

Measure:

Positive Lead	Measurement / Action	Negative Lead
C719-4	Courtesy of FORD MOTOR COMPANY	C719-6

Is the voltage greater than 10 volts?

Yes	INSTALL new window control switch. REFER to: Rear Door Window Control Switch .

GO to G10

G10 CHECK THE ILLUMINATION GROUND CIRCUIT FOR AN OPEN

Ignition OFF.

Disconnect DDM C501B.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C719-6	Courtesy of FORD MOTOR COMPANY	C501B-11

Is the resistance less than 3 ohms?

Yes

GO to G11

No	Repair the circuit.

G11 CHECK FOR CORRECT DDM (DRIVER DOOR MODULE) OPERATION

Disconnect and inspect all DDM and related in-line 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 DDM and related in-line connectors and all previously disconnected illumination system connectors. Make sure all connectors seat and latch correctly.

Operate the system to determine if the concern is still present.

Is the concern still present?

Yes	CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new DDM. REFER to: Driver Door Module (DDM) .

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.