Ford Workshop Service and Repair Manuals

Refer to Wiring Diagrams Section 417-04, for schematic and connector information.

Operation

The daytime running lamps (DRL) are ON under the following conditions:

• Ignition switch in RUN position.
• Headlamp switch in OFF position.

The DRL system is designed to turn the low beam headlamps ON automatically as soon as engine is running. The driver can disable the DRL system by any of the following actions:

• Turning the ignition switch to any position except RUN.
• Turning the headlamp switch to any position except OFF.

Inspection and Testing

NOTE:Before reading out the vehicle-specific data, remake all the separated electrical connections in the vehicle, so that communication between the module and WDS is ensured.

NOTE:The generic electronic module (GEM) forms part of the central junction box (CJB).

NOTE:If the generic electronic module (GEM) is changed, the new one must be reinitialized. For this purpose, the vehicle-specific data is read out of the module to be replaced using WDS and is transferred to the new module. REFER to:

Kommunikations-Netzwerk (418-00, Diagnosis and Testing),

Zentralelektrikmodul (GEM) (419-10, Diagnosis and Testing).

Visual Inspection Chart

Symptom chart

Symptom chart

Pinpoint Test

NOTE:Use a digital multimeter for all electrical measurements.

PINPOINT TEST A : THE DAYTIME RUNNING LAMPS ARE INOPERATIVE
TEST CONDITIONS	DETAILS/RESULTS/ACTIONS
A1: CHECK FUSE F48 (5 A) (SRB)
NOTE:Headlamp switch in OFF position.
	1 Ignition switch in position 0.
	2 Disconnect CHECK fuse F48 (5 A) (SRB).
	3 CHECK CHECK fuse F48 (5 A) (SRB).
	Is the fuse OK? Yes GO to A2. No RENEW fuse F48 (5 A) (SRB) CHECK system operates correctly If fuse blows again, LOCATE and REMEDY the short to ground using the Wiring Diagrams. CHECK system operates correctly
A2: CHECK THE VOLTAGE SUPPLY TO FUSE F48 (5 A) (SRB) FOR OPEN CIRCUIT
	1 Connect CHECK fuse F48 (5 A) (SRB).
	2 Ignition switch in position II.
	3 Measure the voltage between fuse F48 (5 A) (SRB) and ground.
	Does the meter display battery voltage? Yes GO to A3. No LOCATE AND RECTIFY the break in the voltage supply of fuse F48 (5A) (SRB) using the Wiring Diagrams. CHECK system operates correctly
A3: CHECK FUSE F54 (30 A) (SRB)
	1 Ignition switch in position 0.
	2 Disconnect CHECK fuse F54 (30 A) (SRB).
	3 CHECK CHECK fuse F54 (30 A) (SRB).
	Is the fuse OK? Yes GO to A4. No RENEW fuse F54 (30 A) (SRB) CHECK system operates correctly If fuse blows again, LOCATE and RECTIFY the short to ground using the Wiring Diagrams. CHECK system operates correctly
A4: CHECK THE VOLTAGE SUPPLY TO FUSE F54 (30 A) (SRB) FOR OPEN CIRCUIT
	1 Connect CHECK fuse F54 (30 A) (SRB).
	2 Ignition switch in position II.
	3 Measure the voltage between fuse F54 (30 A) (SRB) and ground.
	Does the meter display battery voltage? Yes GO to A5. No LOCATE AND RECTIFY the break in the voltage supply of fuse F54 (30 A) (SRB) using the Wiring Diagrams. CHECK system operates correctly
A5: RULE OUT CENTRAL JUNCTION BOX (CJB) AS THE CAUSE OF THE FAULT
	1 Ignition switch in position 0.
	2 Disconnect Central junction box (CJB) from connector CBP02D.
	3 Connected a fused jumper wire (5 A) to the central junction box (CJB), connector CBP02D, between pin 12, circuit CLF10A (GN/OG), wiring harness side and ground.
	4 Ignition switch in position II.
	5 Check the daytime running lamps.
	Are the daytime running lamps lit up? Yes INSTALL a new CJB. CHECK system operates correctly No GO to A6.
A6: CHECK THE CONTROL CIRCUIT OF THE THE DAYTIME RUNNING LAMPS RELAY FOR OPEN CIRCUIT
	1 Ignition switch in position 0.
	2 Disconnect Standard relay box (SRB) from connector CB101B.
	3 Measure the resistance between the central junction box (CJB), connector CBP02D, pin 12, circuit CLF10A (GN/OG), wiring harness side and standard relay box (SRB), connector CB101B, pin 10, circuit CLF10A (GN/OG), wiring harness side.
	Is a resistance of less than 2 ohms registered? Yes RENEW standard relay box (SRB). CHECK system operates correctly No LOCATE and RECTIFY break in circuit between central junction box (CJB) and standard relay box (SRB). CHECK system operates correctly

PINPOINT TEST B : THE DAYTIME RUNNING LAMPS ARE ON WITH IGNITION SWITCH OFF
TEST CONDITIONS	DETAILS/RESULTS/ACTIONS
B1: DETERMINE THE FAULT CONDITION
NOTE:Headlamp switch in OFF position.
	1 Ignition switch in position 0.
	2 CHECK the low beam (DRL).
	Does the dipped beam (DRL) illuminate continuously? Yes Diminished dipped beam permanently on: GO to B3. No - Undiminished dipped beam permanently on: GO to B2. - Parking lamps illuminate continuously: REFER to: Parkleuchten, Rückleuchten, Kennzeichenleuchten (417-01, Diagnosis and Testing). - License lamps illuminate continuously: REFER to: Parkleuchten, Rückleuchten, Kennzeichenleuchten (417-01, Diagnosis and Testing).
B2: ELIMINATE THE STANDARD RELAY BOX (SRB) AS CAUSE OF THE SHORT TO BATTERY VOLTAGE
	1 Disconnect Standard relay box (SRB) from connector CB101C.
	2 CHECK the low beams.
	Is the dipped beam permanently lit on the left-hand side? Yes LOCATE and RECTIFY the short to battery voltage in the circuits between standard relay box (SRB) and the left-hand headlamp using the Wiring Diagrams. CHECK system operates correctly No - Right-hand dipped beam lit: LOCATE and RECTIFY the short to battery voltage in the circuits between standard relay box (SRB) and the right-hand headlamp using the Wiring Diagrams. - No dipped beam illuminates: REFER to: Scheinwerfer (417-01, Diagnosis and Testing).
B3: RULE OUT CENTRAL JUNCTION BOX (CJB) AS THE CAUSE OF THE FAULT
	1 Disconnect Central junction box (CJB) from connector CBP02D.
	2 CHECK the low beams.
	Does the diminished dipped beam (DRL) illuminate continuously? Yes GO to B4. No INSTALL a new CJB. CHECK system operates correctly
B4: CHECK CONTROL CIRCUIT OF DAYTIME RUNNING LAMPS RELAY FOR SHORT TO GROUND
	1 Disconnect Standard relay box (SRB) from connector CB101B.
	2 CHECK the headlamps.
	Does the diminished dipped beam (DRL) illuminate continuously? Yes RENEW standard relay box (SRB). CHECK system operates correctly No LOCATE and RECTIFY the short to ground in the circuit between standard relay box (SRB) and central junction box (CJB) using the Wiring Diagrams. CHECK system operates correctly