Daytime running lights (cars after 08.2001) — Pinpoint tests (Focus 1)

D1: CHECKING THE LOW BEAM

1Enter the ON position.

2Turn on the low beam headlights.

3Check the low beam headlights.

• Are the low beams on?

→ Yes

Go to D2

→ No

Section 417-01 Headlights,

D2: DETERMINING VEHICLE EQUIPMENT

1Determine the vehicle equipment.

• Does the car have regular headlights?

→ Yes

Go to D3

→ No

Xenon Headlights: Go to D9

D3: CHECKING FUSE F25 (BJB)

1Enter the OFF position.

2CHECK Fuse F25 (BJB).

3Check fuse F25 (20A)

• Is the fuse good?

→ Yes

Go to D4

→ No

INSTALL a new F25 (20A) fuse and TEST the system. If the fuse blows again, LOCATE and REPAIR the short circuit using the wiring diagrams. TEST the system for proper operation.

D4: CHECKING THE ELECTRICAL POWER SUPPLY CIRCUIT OF FUSE F25 (BJB)

1Connect Fuse F25 (BJB).

2Enter the ON position.

3Measure the voltage between fuse F25 (BJB) and ground.

• Is battery voltage registered?

→ Yes

Go to D5

→ No

Using the wiring diagrams, REPAIR the open in the 30-DC25 (red) circuit between splice S102 (battery supply) and fuse F25. CHECK for proper system operation.

D5: CHECKING THE DAYTIME RUNNING LIGHT (DRL) RELAY POWER SUPPLY CIRCUIT

1Enter the OFF position.

2Disconnect C1012 Daytime Running Light (DRL) Relay.

3Measure the voltage between pin 5 of connector C1012, Daytime Running Light (DRL) relay, circuit 30-LE8 (RED), BJB side and ground.

• Is battery voltage registered?

→ Yes

Go to D6

→ No

Using the wiring diagrams, REPAIR open in circuit 30-LE8 (RED) (DTRL resistor wire) between fuse F25 and daytime running light (DRL) relay CHECK for proper system operation.

D6: CHECKING THE DAYTIME RUNNING LIGHT (DRL) RELAY CONTROL CIRCUIT

1Enter the ON position.

2Measure the voltage between pin 1 of the daytime running lights (DRL) relay connector C1012, circuit 15S-LE6 (YE/GN), BJB side and ground.

• Is battery voltage registered?

→ Yes

Go to D7

→ No

Go to D8

D7: CHECKING THE GROUND CIRCUIT OF THE DAYTIME RUNNING LIGHT (DRL) RELAY

1Enter the OFF position.

2Measure the resistance between pin 2 of the daytime running lights (DRL) relay connector C1012, circuit 91-LE6 (BK/YE), BJB side and ground.

• Is the resistance less than 2 ohms?

→ Yes

INSTALL a new Daytime Running Light (DRL) relay. CHECK the system for proper operation.

→ No

Using the wiring diagrams, REPAIR the open in circuit 91-LE6 (BK/YEL) between the daytime running lamp (DRL) relay and splice S118 (Ground Point G1). CHECK for proper system operation.

D8: CHECKING THE LIGHTING SWITCH (CARS WITH CONVENTIONAL HEADLIGHTS)

1Enter the OFF position.

2Connect C1012 daytime running light (DRL) relay.

3Disconnect the C320 light switch.

4Install a fused jumper wire (20A) into the C320 connector of the light switch, between pin 4, circuit 15S-LE14 (red/green), and pin 8, circuit 15-LE29 (black/green), on the wiring side.

5Enter the ON position.

6Check the low beam headlights.

• Are the low beam headlights (DRL) on?

→ Yes

INSTALL a new light switch. CHECK the system for proper operation.

→ No

Using the wiring diagrams, LOCATE and REPAIR the open in the 15S-LE14(A) (Red/Green) and 15S-LE6(A) (Yellow/Green) circuit between the light switch and the daytime running lamp (DRL) relay. CHECK the system for proper operation.

D9: CHECKING THE LIGHTING SWITCH (CARS WITH XENON HEADLIGHTS)

1Enter the OFF position.

2Disconnect the C320 light switch.

3Connect C1012 daytime running light (DRL) relay.

4Install a fused jumper wire (20A) into light switch connector C320, between pin 4, circuit 15S-LE14 (red/green) and pin 8, circuit 15-LE29 (black/green), on the harness side.

5Enter the ON position.

6Check the low beam headlights.

• Are the low beam headlights (DRL) on?

→ Yes

INSTALL a new light switch. CHECK the system for proper operation.

→ No

Using the wiring diagrams, LOCATE and REPAIR the open in the 15S-LE14 (Red/Green) circuit between the light switch and the DTRL connector of the C907 connector and in the 15S-LE29B (Black/Green) circuit between pin 2 and pin 4 of the C907 connector (DTRL connector). CHECK the correct operation of the system.

E1: CHECKING THE FAULT STATUS

1Enter the OFF position.

2Disconnect C1012 Daytime Running Light (DRL) Relay.

3Check the low beam headlights.

• Are the low beam headlights constantly on?

→ Yes

Section 417-01 Headlights,

→ No

Go to E2

E2: CHECK DAYTIME RUNNING LIGHT (DRL) RELAY CONTROL CIRCUIT FOR SHORT TO POWER SUPPLY

1Measure the voltage at connector C1012 of the daytime running light (DRL) relay between pin 1, circuit 15S-LE6 (GN/YE), and pin 2, circuit 91-LE6 (BK/YE), BJB side.

• Is battery voltage registered?

→ Yes

Go to E3

→ No

CHECK the daytime running light (DRL) relay as described in the "Element Test" section of the electrical wiring diagrams; iNSTALL a new one if necessary. If relay is OK, Section 417-01, Headlamps.

E3: DETERMINING THE PRESENCE OF A SHORT CIRCUIT IN THE POWER SUPPLY CIRCUIT

1Connect C1012 daytime running light (DRL) relay.

2Disconnect Fuse F59 (CJB).

3Check the low beam headlights.

• Do the low beam headlights (DRL) stay on all the time?

→ Yes

Go to E5

→ No

Go to E4

E4: CHECKING THE IGNITION SWITCH

1Connect Fuse F59 (CJB).

2Disconnect C456 ignition switch.

3Check the low beam headlights.

• Do the low beam headlights (DRL) stay on all the time?

→ Yes

Using the wiring diagrams, LOCATE and REPAIR the short to power in the electrical circuit between the ignition switch and fuse F59 (CJB). INSTALL a new CJB if necessary. CHECK the system for proper operation.

→ No

Install a new ignition switch. CHECK the system for proper operation.

E5: DETERMINING THE PRESENCE OF A SHORT CIRCUIT IN THE POWER SUPPLY CIRCUIT

1Disconnect the C320 light switch.

2Check the low beam headlights.

• Do the low beam headlights (DRL) stay on all the time?

→ Yes

Vehicles with conventional headlights: Using the wiring diagrams, LOCATE and REPAIR the short to power in the 15S-LE6(A) (yellow/green) and 15S-LE14(A) (red/green) circuits between the daytime running light (DRL) relay and the light switch. CHECK that the system is operating correctly.

Cars with xenon headlights, with DTRL: Go to E7

Vehicles with xenon headlamps, without DTRL: Section 417-01, Headlamps.

→ No

Go to E6

E6: CHECKING THE ELECTRICAL CIRCUIT OF THE LIGHT SWITCH FOR A SHORT CIRCUIT TO THE ELECTRICAL SUPPLY CIRCUIT

1Measure the voltage between pin 8 of the light switch connector C320, circuit 15-LE29 (black/green), harness side, and ground.

• Is battery voltage registered?

→ Yes

Using the wiring diagrams, LOCATE and REPAIR the short to power in the circuit between the F59 (CJB) fuse for the light switch and the multifunction switch. INSTALL a new CJB if necessary. CHECK the system for proper operation.

→ No

INSTALL a new light switch. CHECK the system for proper operation.

E7: DETERMINING THE PRESENCE OF A SHORT CIRCUIT IN THE POWER SUPPLY CIRCUIT

1Disconnect C907 Daytime Running Lights (DTRL) connector.

2Check the low beam headlights.

• Do the low beam headlights (DRL) stay on all the time?

→ Yes

Section 417-01 Headlights,

→ No

Parking lights do not light: Using the wiring diagrams, LOCATE and REPAIR the short to power in the 15S-LE14 (red/green) and 15S-LE29 (black/green) circuits between the light switch and the C907 connector of the DTRL connector. CHECK that the system is operating correctly.

Parking lights illuminated: Section 417-01, Parking, Tail, and Courtesy Lights.

F1: STATE DETERMINATION

1Turn on the PARAMETER LIGHTS.

2Check the parking lights.

• Are the side lights on?

→ Yes

Go to F2

→ No

Section 417-01 Parking, Tail, and License Plate Lights

F2: CHECK LIGHT SWITCH ELECTRICAL CIRCUIT 15S-LE29 (BLACK/GREEN) FOR OPEN CIRCUIT

1Enter the OFF position.

2Disconnect the C320 light switch.

3Enter the ON position.

4Measure the resistance at the light switch connector C320 between pin 15, circuit 15S-LE29 (black/green), and pin 4, circuit 15S-LE14 (red/green), harness side.

• Is the resistance less than 2 ohms?

→ Yes

INSTALL a new light switch. CHECK the system for proper operation.

→ No

Using the wiring diagrams, REPAIR the open in the electrical circuit 15S-LE29 (black/green) and respectively 15S-LE14A (red/green) between the connector C906 of the DTRL connector (and respectively C907, if equipped with xenon headlights) and the light switch. CHECK the correct operation of the system.