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418 Electrical Distribution > < Interior Lighting - Vehicles Built From: 10-2005

Fiesta 2002.25 (11.2001-)

Daytime Running Lamps (DRL) - Daytime Running Lamps (DRL) Fiesta 2002.25 (11/2001-)
Diagnosis and Testing

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

Special Tool(s)

Terminal Probe Kit

29-011A

Inspection and Checking

  1. Verify the customer concern.
  1. Visually inspect for obvious signs of electrical damage.

Visual Inspection

Electrical
  • Fuse(s)
  • Lamp(s)
  • Connector(s)
  • Switches
  • Wiring harness
  1. Resolve any obvious causes or concerns found during the visual inspection before carrying out any further tests.
  1. If the concern is not visually evident, refer to the Symptom Chart.

Symptom Chart

Symptom Chart

Symptom Possible Sources Action
Daytime running lamps inoperative
*
Fuse
*
Circuit(s)
*
Resistance line
*
Daytime running lamp relay
*
Headlamp switch
*
Central junction box (CJB)
*
GO to Pinpoint Test A.
Daytime running lamps are on, with the ignition switch off
*
Circuit(s)
*
Resistance line
*
Daytime running lamp relay
*
Headlamp switch
*
GO to Pinpoint Test B.

System Checks

NOTE:
NOTE:Use a digital multimeter for all electrical measurements.

PINPOINT TEST A : DAYTIME RUNNING LAMPS INOPERATIVE
TEST CONDITIONS DETAILS/RESULTS/ACTIONS
A1: DETERMINE THE FAULT CONDITION
NOTE:
NOTE:Set the headlamp switch to OFF
1
Ignition switch in position II.
2
Check the operation of the daytime running lamp (DRL) parking lamps, DRL dipped beam and DRL license plate lamps.

Are the DRL dipped beam, DRL parking lamps and DRL license plate lamps inoperative?
Yes
- DRL parking lamps, DRL dipped beams and the DRL license plate lamps are inoperative, vehicles built before 08/2005: GO to A2.
- DRL parking lamps, DRL dipped beams and the DRL license plate lamps are inoperative, vehicles built after 08/2005: GO to A4.
No
- DRL parking lamps and DRL license plate lamps are inoperative: GO to A9.
- DRL-dipped beam inoperative:GO to A11.
A2: CHECK FUSE F40 (10 A) (CJB).
1
Ignition switch in position 0.
2
Disconnect fuse F40 (10 A) (CJB).
3
CHECK fuse F40 (10 A) (CJB).

Is the fuse OK?
Yes
GO to A3.
No
RENEW fuse F40 (10 A) (CJB) and CHECK the operation of the system. If the fuse blows again, LOCATE and RECTIFY the short to ground using the Wiring Diagrams. CHECK the operation of the system.
A3: CHECK THE VOLTAGE SUPPLY TO FUSE F40 (10 A) (CJB)
1
Connect fuse F40 (10 A) (CJB).
2
Ignition switch in position II.
3
Measure the voltage between fuse F40 (10 A) and ground.

Does the meter display battery voltage?
Yes
CHECK and if necessary INSTALL A NEW CJB. CHECK the operation of the system.
No
LOCATE AND RECTIFY the break in the voltage supply of fuse F40 (10A) (CJB) using the Wiring Diagrams. CHECK the operation of the system.
A4: CHECK FUSE F31 (10 A) (CJB).
1
Ignition switch in position 0.
2
Disconnect fuse F31 (10 A) (CJB).
3
CHECK fuse F31 (10 A) (CJB).

Is the fuse OK.?
Yes
GO to A5.
No
RENEW fuse F31 (10 A) (CJB) and CHECK the operation of the system. If the fuse blows again, LOCATE and RECTIFY the short to ground using the Wiring Diagrams. CHECK the operation of the system.
A5: CHECK THE VOLTAGE SUPPLY TO FUSE F31 (10 A) (CJB)
1
Connect fuse F31 (10 A) (CJB).
2
Ignition switch in position II.
3
Measure the voltage between fuse F31 (10 A) (CJB) and ground.

Does the meter display battery voltage?
Yes
GO to A6.
No
LOCATE AND RECTIFY the break in the voltage supply of fuse F31 (10A) (CJB) using the Wiring Diagrams. CHECK the operation of the system.
A6: CHECK THE VOLTAGE SUPPLY OF THE AUTOMATIC HEADLAMPS RELAY - LOAD CURRENT CIRCUIT, FOR OPEN CIRCUIT
1
Ignition switch in position 0.
2
Disconnect Automatic headlamps relay from socket C418.
3
Ignition switch in position II.

4
Measure the voltage between the automatic headlamps relay, socket C418, pin 3, circuit 15-LE29A (GN/BK), socket side and ground.

Does the meter display battery voltage?
Yes
GO to A7.
No
LOCATE and RECTIFY the break in the circuits between fuse F31 (10 A) (CJB) and the automatic headlamps relay using the Wiring Diagrams. CHECK the operation of the system.
A7: CHECK THE VOLTAGE SUPPLY OF THE AUTOMATIC HEADLAMPS RELAY - CONTROL CIRCUIT, FOR OPEN CIRCUIT

1
Measure the voltage between the automatic headlamps relay, socket C418, pin 1, circuit 15-LE36 (GN/WH), socket side and ground.

Does the meter display battery voltage?
Yes
GO to A8.
No
LOCATE and RECTIFY the break in the circuit between soldered connection S1 and the automatic headlamps relay using the Wiring Diagrams. CHECK the operation of the system.
A8: CHECK THE GROUND CONNECTION OF THE AUTOMATIC HEADLAMPS RELAY FOR OPEN CIRCUIT
1
Ignition switch in position 0.

2
Measure the resistance between the automatic headlamps relay, socket C418, pin 2, circuit 31-LE36 (BK), socket side and ground.

Is a resistance of less than 2 ohms registered?
Yes
RENEW the automatic headlamps relay. CHECK the operation of the system.
No
LOCATE and RECTIFY the break in the circuit between soldered connection S15 and the automatic headlamps relay using the Wiring Diagrams. CHECK the operation of the system.
A9: CHECK CIRCUIT 15-LE32 (GN/WH) FOR OPEN CIRCUIT
1
Ignition switch in position 0.
2
Disconnect headlamp switch from connector C338.
3
Ignition switch in position II.

4
Measure the voltage between the headlamp switch C338, pin 15, circuit 15-LE32 (GN/WH), wiring harness side and ground.

Does the meter display battery voltage?
Yes
GO to A10.
No
- Vehicles built before 08/2005: LOCATE and RECTIFY the break in the circuit between fuse F40 (10A) (CJB) and the headlamp switch using the Wiring Diagrams. CHECK the operation of the system.
- Vehicles built after 08/2005: LOCATE and RECTIFY the break in the circuit between the automatic headlamps relay and the headlamp switch using the Wiring Diagrams. CHECK the operation of the system.
A10: CHECK THE HEADLAMP SWITCH
1
Ignition switch in position 0.

2
Connect a fused jumper wire (10 A) at the headlamp switch, connector C338, between pin 15, circuit 15-LE32 (GN/WH) and pin 13, circuit 29S-DB8 (OG/BU), wiring harness side.
3
Ignition switch in position II.
4
CHECK parking lamps.

Do the parking lamps illuminate?
Yes
INSTALL A NEW headlamp switch. CHECK the operation of the system.
No
LOCATE and RECTIFY the break in the circuit between the headlamp switch and bridge (CJB) using the Wiring Diagrams. CHECK the operation of the system.
A11: CHECK THE VOLTAGE SUPPLY OF THE HEADLAMP SWITCH
1
Ignition switch in position II.
2
OPERATE headlamp flasher.
3
CHECK the headlamp.

Is headlamp flasher working?
Yes
GO to A12.
No
- Vehicles built before 08/2005: LOCATE and RECTIFY break in circuit 15-LE29 (GN/BK), between fuse F40 (10 A) (CJB) and headlamp switch using the Wiring Diagrams. CHECK the operation of the system.
- Vehicles built after 08/2005: LOCATE and RECTIFY break in circuit 15-LE29 (GN/BK), between the automatic headlamps relay and the headlamp switch using the Wiring Diagrams. CHECK the operation of the system.
A12: CHECK FUSE F19 (15 A) (CJB).
1
Ignition switch in position 0.
2
Disconnect fuse F19 (15 A) (CJB).
3
CHECK fuse F19 (15 A) (CJB).

Is the fuse OK?
Yes
GO to A13.
No
RENEW fuse F19 (15 A) (CJB) and check the operation of the system. If the fuse blows again, LOCATE and RECTIFY the short to ground using the Wiring Diagrams. CHECK the operation of the system.
A13: CHECK THE VOLTAGE SUPPLY TO FUSE F19 (15 A) (CJB)
1
Connect fuse F19 (15 A) (CJB).
2
Ignition switch in position II.
3
Measure the voltage between fuse F19 (15 A) (CJB) and ground.

Does the meter display battery voltage?
Yes
GO to A14.
No
RECTIFY the break in the voltage supply of fuse F19 (15 A) (CJB) using the Wiring Diagrams. CHECK the operation of the system.
A14: CHECK FUSE F11 (15 A) (CJB).
1
Ignition switch in position 0.
2
Disconnect fuse F11 (15 A) (CJB).
3
CHECK fuse F11 (15 A) (CJB).

Is the fuse OK?
Yes
GO to A15.
No
RENEW fuse F11 (15 A) (CJB) and check the operation of the system. If the fuse blows again, LOCATE and RECTIFY the short to ground using the Wiring Diagrams. CHECK the operation of the system.
A15: CHECK THE HEADLAMP SWITCH
1
Ignition switch in position 0.
2
Connect fuse F11 (15 A) (CJB).
3
Disconnect headlamp switch from connector C338.

4
Connect a fused jumper wire (10 A) to the headlamp switch, connector C338, between pin 8, circuit 15-LE29 (GN/BK)/15-LE14 (GN/RD) and pin 4, circuit 15S-LE6 (GN/YE), wiring harness side.
5
Ignition switch in position II.
6
CHECK the DRL dipped beam.

Does the DRL dipped beam illuminate?
Yes
INSTALL A NEW headlamp switch. CHECK the operation of the system.
No
GO to A16.
A16: CHECK VOLTAGE SUPPLY OF DRL RELAY - LOAD CURRENT CIRCUIT - FOR OPEN CIRCUIT
1
Ignition switch in position 0.
2
Connect Headlamp switch to connector C338.
3
Disconnect DRL relay from socket C409.
4
Ignition switch in position II.

5
Measure the voltage between the DRL relay, socket C409, pin 3, circuit 29-LE7 (OG/BU), socket side and ground.

Does the meter display battery voltage?
Yes
GO to A17.
No
LOCATE and RECTIFY the break in the circuit between fuse F19 (15A) (CJB) and the DRL relay using the Wiring Diagrams. CHECK the operation of the system.
A17: CHECK VOLTAGE SUPPLY OF DRL RELAY - CONTROL CIRCUIT - FOR OPEN CIRCUIT

1
Measure the voltage between the DRL relay, socket C409, pin 1, circuit 15S-LE6 (GN/YE), socket side and ground.

Does the meter display battery voltage?
Yes
GO to A18.
No
LOCATE and RECTIFY the break in the circuit between the headlamp switch and DRL relay (DRL) using the Wiring Diagrams. CHECK the operation of the system.
A18: CHECK THE GROUND CONNECTION TO THE DRL RELAY FOR OPEN CIRCUIT
1
Ignition switch in position 0.

2
Measure the resistance between the DRL relay, socket C409, pin 2, circuit 31-LE6 (BK), socket side and ground.

Is a resistance of less than 2 ohms registered?
Yes
GO to A19.
No
LOCATE and RECTIFY the break in the circuit between the DRL relay and soldered connection S15 using the Wiring Diagrams. CHECK the operation of the system.
A19: CHECK THE DRL RELAY

1
Using a fused jumper wire (15 A) at the daytime running lamp relay, connect socket C409, pin 3 circuit 29-LE7 (OG/BU) and pin 5, circuit 15S-LE8B (GN/RD), socket side.
2
Ignition switch in position II.
3
CHECK the DRL dipped beam.

Does the DRL dipped beam illuminate?
Yes
INSTALL A NEW DRL relay. CHECK the operation of the system.
No
GO to A20.
A20: CHECK THE VOLTAGE SUPPLY TO FUSE F11 (15 A) (CJB)
1
Ignition switch in position 0.
2
Connect DRL relay to socket C409.
3
Ignition switch in position II.
4
Measure the voltage between fuse F11 (15 A) (CJB) and ground.

Does the meter display battery voltage?
Yes
CHECK and if necessary RENEW the CJB. CHECK the operation of the system.
No
RECTIFY the break in circuit(s) 15S-LE8B (GN/RD), 15S-LE8A (DRL resistor (GN/RD)) or 15S-LE8 (GN/RD) between the DRL relay and fuse F11 (15 A) (CJB) using the Wiring Diagrams. CHECK the operation of the system.

PINPOINT TEST B : DAYTIME RUNNING LAMPS ARE ON, WITH THE IGNITION SWITCH OFF
TEST CONDITIONS DETAILS/RESULTS/ACTIONS
B1: NARROW DOWN THE FAULT
1
Ignition switch in position 0.
2
Check the daytime running lamps.

Do the daytime running lamps illuminate continuously?
Yes
- Vehicles built before 08/2005: GO to B4.
- Vehicles built after 08/2005: GO to B5.
No
Only the DRL dipped beam illuminates continuously: GO to B2.
B2: CHECK THE DRL RELAY
1
Disconnect DRL relay from socket C409.

2
Measure the voltage between the DRL relay, socket C409, pin 5, circuit 15S-LE8B (GN/RD), socket side and ground.

Does the meter display battery voltage?
Yes
GO to B3.
No
RENEW the DRL relay. CHECK the operation of the system.
B3: NARROW DOWN THE FAULT
1
Disconnect fuse F11 (15 A) (CJB).

2
Measure the voltage between the DRL relay, socket C409, pin 5, circuit 15S-LE8B (GN/RD), socket side and ground.

Does the meter display battery voltage?
Yes
LOCATE and RECTIFY the short to battery voltage in the circuit(s) connected to soldered connection S27 or S26 using the Wiring Diagrams. CHECK and INSTALL A NEW CJB if necessary. CHECK the operation of the system.
No
LOCATE and RECTIFY the short to battery voltage in circuits between fuse F11 (15 A) (CJB) (output side) and bridge (CJB) using the Wiring Diagrams. CHECK the operation of the system. If the fault persists,
REFER to: Scheinwerfer (417-01, Diagnosis and Testing).
B4: NARROW DOWN THE FAULT
1
Disconnect fuse F40 (10 A) (CJB).
2
Check the daytime running lamps.

Do the daytime running lamps illuminate continuously?
Yes
GO to B7.
No
LOCATE and RECTIFY the short to battery voltage in the circuits connected to fuse F40 (10 A) (CJB), input side, using the Wiring Diagrams. CHECK the operation of the system.
B5: NARROW DOWN THE FAULT
1
Disconnect Automatic headlamps relay from socket C418.
2
Check the daytime running lamps.

Are all daytime running lamps lit permanently?
Yes
GO to B7.
No
GO to B6.
B6: CHECK THE CONTROL CIRCUIT OF THE AUTOMATIC HEADLAMPS RELAY FOR SHORT TO BATTERY VOLTAGE

1
Measure the voltage between the automatic headlamps relay, socket C418, pin 1, circuit 15-LE36 (GN/WH), socket side and ground.

Does the meter display battery voltage?
Yes
LOCATE and RECTIFY the short to battery voltage in the circuits connected to soldered connection S1 using the Wiring Diagrams. CHECK the operation of the system.
No
RENEW the automatic headlamps relay. CHECK the operation of the system.
B7: NARROW DOWN THE FAULT
1
Disconnect headlamp switch from connector C338.
2
Check the daytime running lamps.

Does the DRL dipped beam illuminate?
Yes
LOCATE and RECTIFY short to battery voltage in circuit 15S-LE6 (GN/YE) between headlamp switch and DRL relay using the Wiring Diagrams. CHECK the operation of the system.
No
- DRL parking lamps and DRL license plate lamps illuminate continuously:
REFER to: Parkleuchten, Rückleuchten, Kennzeichenleuchten (417-01, Diagnosis and Testing).
- Daytime running lamps do not illuminate continuously: GO to B8.
B8: CHECK THE HEADLAMP SWITCH

1
Measure the voltage between the headlamp switch, connector C338, pin 15, circuit 15-LE32 (GN/WH), wiring harness side and ground.

Does the meter display battery voltage?
Yes
- Vehicles built before 08/2005: LOCATE and RECTIFY the short to battery voltage in the circuits connected to fuse F40 (10 A) (CJB), output side, using the Wiring Diagrams. CHECK the operation of the system.
- Vehicles built after 08/2005: LOCATE and RECTIFY the short to battery voltage in the circuits connected to the automatic headlamps relay, socket C418, pin 5 using the Wiring Diagrams. CHECK the operation of the system.
No
INSTALL A NEW headlamp switch. CHECK the operation of the system.

418 Electrical Distribution > < Interior Lighting - Vehicles Built From: 10-2005