Fog lights (cars after 08.2001) — Pinpoint tests (Focus 1)

AQ1: CHECKING FUSE F44 (CJB)

1Enter the OFF position.

2CHECK Fuse F44 (CJB).

3Check fuse F44 (20A)

• Is the fuse good?

→ Yes

Go to AQ2

→ No

INSTALL a new fuse F44 (20A) and CHECK the system for proper operation. If the fuse blows again, LOCATE and REPAIR the short circuit using the wiring diagrams. Check the system for proper operation.

AQ2: CHECKING THE VOLTAGE IN THE FUSE CIRCUIT F44 (CJB)

1Connect Fuse F44 (CJB).

2Enter the ON position.

3Measure the voltage between F44 (CJB) and ground.

• Is battery voltage registered?

→ Yes

Go to AQ3

→ No

Using the wiring diagrams, LOCATE and REPAIR the short circuit in the power supply circuit to fuse F44. INSTALL a new CJB if necessary. Check that the system is operating correctly.

AQ3: CHECKING THE LIGHT SWITCH POWER SUPPLY CIRCUIT

1Enter the OFF position.

2Disconnect the C320 light switch.

3Enter the ON position.

4Measure the voltage between pin 7 of the light switch connector C320, circuit 15-LD16 (red/green), harness side, and ground.

• Is battery voltage registered?

→ Yes

CHECK the light switch as described in the section "Checking the components" attached to the electrical connection diagrams, if necessary INSTALL a new one. Check that the system is working correctly.

→ No

Using the wiring diagrams, LOCATE and REPAIR the open in the 15-LD16 (Red/Green) circuit between the fuse and the light switch. Check for proper system operation.

AR1: CHECKING THE FRONT FOG LIGHTS

1Enter the ON position.

2Turn on the front fog lights.

3Check the operation of the front fog lights.

• Is the front fog light on?

→ Yes

Go to AR2

→ No

INSTALL a new light switch. Check that the system operates correctly.

AR2: CHECKING THE LIGHT SWITCH

1Enter the OFF position.

2Disconnect the C320 light switch.

3Install a fused jumper wire (20 A) into the C320 connector of the light switch, between pin 7, circuit 15-LD16 (red/green), harness side, and pin 3, circuit 15S-LD1 (yellow/green), harness side.

4Enter the ON position.

5Check the front fog lights.

• Are the front fog lights on?

→ Yes

INSTALL a new light switch. Check that the system operates correctly.

→ No

Using the wiring diagrams, LOCATE and REPAIR the open in the 15S-LD1 (yellow/green) circuit between the light switch and splice S110. Check for proper system operation.

AS1: CHECKING REAR FOG LIGHTS

1Enter the ON position.

2Turn on the REAR FOG LIGHTS.

3Check the rear fog lights.

• Are the rear fog lights on?

→ Yes

4-door only: Go to AS2

All others: Go to AS3

→ No

INSTALL a new light switch. Check that the system operates correctly.

AS2: CHECKING THE EARTH CIRCUIT OF THE TAIL LAMP ASSEMBLY

1Enter the OFF position.

2Turn on the PARAMETER LIGHTS.

3Check the parking lights.

• Are the side lights on?

→ Yes

Go to AS3

→ No

Using the wiring diagrams, LOCATE and REPAIR the open in circuit 31-DA18 (black) between splice S184 and ground point G46. Check for proper system operation.

AS3: CHECK LIGHT SWITCH

1Disconnect the C320 light switch.

2Install a fused jumper wire (20A) into the C320 connector of the light switch between pin 7, circuit 15-LD16 (red/green), and pin 2, circuit 15S-LD6 (yellow/green), on the wiring side.

3Enter the ON position.

4Check the rear fog lights.

• Are the rear fog lights on?

→ Yes

INSTALL a new light switch. Check that the system operates correctly.

→ No

4-Door, Right Hand Drive Only: Using the wiring diagrams, LOCATE and REPAIR the open in the 15S-LD6 (Yellow/Green) or 15S-LG9 (Black/Green) circuit between the light switch and splice S210. Check for proper system operation.

Go to AT1

AT1: DETERMINING THE STATE IN WHICH THE MALFUNCTION OCCURS

1Enter the ON position.

2Turn on the FOG LIGHTS/LIGHTS.

3Check the front fog lights.

• One of the front fog lights is not working?

→ Yes

Front Fog Light, Left Side: Go to AT2

Front fog light, right side: Go to AT3

→ No

Rear Fog Light Not Working (Right Hand Drive Estate): Go to AT4

Rear Fog Light Not Working (Right Hand Drive Estate): Go to AT5

Rear Fog Light Not Working (4-Door): Go to AT6

The rear fog lamp does not work (left-hand drive version, 3/5-door version): Go to AT9

Rear Fog Light Not Working (Right Hand Drive 3/5th Edition): Go to AT10

AT2: CHECKING THE ELECTRICAL POWER SUPPLY CIRCUIT OF THE FRONT LEFT FOG LAMP

1Enter the OFF position.

2Disconnect C302 left front fog light.

3Enter the ON position.

4Turn on the front fog lights.

5Measure the voltage between pin 2 of connector C302 left front fog lamp, circuit 15S-LD11 (WH/GN), harness side and ground.

• Is battery voltage registered?

→ Yes

Using the wiring diagrams, LOCATE and REPAIR the open in circuit 31-LD11 (black) and 31-DA3 (black) between the front fog lamp and ground point G37. INSTALL a new fog lamp if necessary. Check for proper system operation.

→ No

Using the wiring diagrams, LOCATE and REPAIR the open in the 15S-LD11 (WH/GN) circuit between splice S110 and the front fog lamp. INSTALL a new fog lamp if necessary. Check for proper system operation.

AT3: CHECKING THE RIGHT FRONT FOG LAMP POWER SUPPLY CIRCUIT

1Enter the OFF position.

2Disconnect C304 right front fog light.

3Enter the ON position.

4Turn on the front fog lights.

5Measure the voltage between pin 2 of connector C304 right front fog lamp, circuit 15S-LD17 (WH/GN), harness side and ground.

• Is battery voltage registered?

→ Yes

Using the wiring diagrams, LOCATE and REPAIR the open in circuit 31-LD17 (Black) and 31-DA4 (Black) between the front fog lamp and ground point G56. INSTALL a new fog lamp if necessary. Check for proper system operation.

→ No

Using the wiring diagrams, LOCATE and REPAIR the open in the 15S-LD17 (WH/GN) circuit between splice S110 and the front fog lamp. INSTALL a new fog lamp if necessary. Check for proper system operation.

AT4: CHECKING THE ELECTRICAL POWER SUPPLY CIRCUIT OF THE LEFT REAR LAMP ASSEMBLY

1Enter the OFF position.

2Disconnect C474 left rear light assembly.

3Enter the ON position.

4Turn on the REAR FOG LIGHTS.

5Measure the voltage between pin 4 of connector C474 of the left tail lamp assembly, circuit 15S-LD6 (YE/GN), harness side and ground.

• Is battery voltage registered?

→ Yes

Using the wiring diagrams, LOCATE and REPAIR the open in circuit 31-LF23A (Black) and 31-DA18 (Black) between the tail lamp assembly and ground. INSTALL a new tail lamp assembly if necessary. Check for proper system operation.

→ No

Using the wiring diagrams, LOCATE and REPAIR the open in the 15S-LD6 (Yellow/Green) circuit between the light switch and the tail lamp assembly. INSTALL a new tail lamp assembly if necessary. Check for proper system operation.

AT5: CHECKING THE RIGHT REAR LAMP ASSEMBLY POWER SUPPLY CIRCUIT

1Enter the OFF position.

2Disconnect C475 right rear light assembly.

3Enter the ON position.

4Turn on the REAR FOG LIGHTS.

5Measure the voltage between pin 4 of connector C475 right tail lamp assembly, circuit 15S-LG9 (BK/GN), harness side and ground.

• Is battery voltage registered?

→ Yes

Using the wiring diagrams, LOCATE and REPAIR the open in circuit 31-LF24A (Black) and 31-DA18 (Black) between the tail lamp assembly and ground. INSTALL a new tail lamp assembly if necessary. Check for proper system operation.

→ No

Using the wiring diagrams, LOCATE and REPAIR the open in the 15S-LD6 (Yellow/Green) and 15S-LG9 (Black/Green) circuit between the light switch and the tail lamp assembly. INSTALL a new tail lamp assembly if necessary. Check for proper system operation.

AT6: DETERMINING THE STATE IN WHICH THE MALFUNCTION OCCURS

1Identify a non-working rear fog light.

• Left rear fog light not working?

→ Yes

Go to AT7

→ No

Go to AT8

AT7: CHECKING THE ELECTRICAL POWER SUPPLY CIRCUIT OF THE LEFT REAR LAMP ASSEMBLY

1Enter the OFF position.

2Disconnect C476 left tail light assembly.

3Enter the ON position.

4Turn on the REAR FOG LIGHTS.

5Measure the voltage between pin 5 of left tail lamp assembly connector C476, circuit 15S-LD6A (YE/GN), harness side and ground.

• Is battery voltage registered?

→ Yes

Using the wiring diagrams, LOCATE and REPAIR the open in circuit 31-LF23 (Black) between the tail lamp assembly and splice S184. INSTALL a new tail lamp assembly if necessary. Check for proper system operation.

→ No

Using the wiring diagrams, LOCATE and REPAIR the open in circuit 15S-LD6A (YE/GN) between splice S210 and tail lamp assembly. INSTALL a new tail lamp assembly if necessary. Check for proper system operation.

AT8: CHECKING THE RIGHT REAR LAMP ASSEMBLY POWER SUPPLY CIRCUIT

1Enter the OFF position.

2Disconnect C477 right rear light assembly.

3Enter the ON position.

4Turn on the REAR FOG LIGHTS.

5Measure the voltage between pin 5 of connector C477 of the right tail lamp assembly, circuit 15S-LD12 (YE/GN), harness side and ground.

• Is battery voltage registered?

→ Yes

Using the wiring diagrams, LOCATE and REPAIR the open in circuit 31-LF24 (Black) between the tail lamp assembly and splice S184. INSTALL a new tail lamp assembly if necessary. Check for proper system operation.

→ No

Using the wiring diagrams, LOCATE and REPAIR the open in the 15S-LD12 (Yellow/Green) circuit between splice S210 and the tail lamp assembly. INSTALL a new tail lamp assembly if necessary. Check for proper system operation.

AT9: CHECKING THE LEFT REAR FOG LAMP POWER SUPPLY CIRCUIT

1Enter the OFF position.

2Disconnect C434 left rear fog light.

3Enter the ON position.

4Turn on the REAR FOG LIGHTS.

5Measure the voltage between pin 1 of connector C434 left rear fog lamp, circuit 15S-LD6 (YE/GN), harness side and ground.

• Is battery voltage registered?

→ Yes

Using the wiring diagrams, LOCATE and REPAIR the open in circuit 31-LD6 (Black) and 31-DA18 (Black) between the rear fog lamp and ground point G46. INSTALL a new rear fog lamp if necessary. Check for proper system operation.

→ No

Using the wiring diagrams, LOCATE and REPAIR the open in the 15S-LD6 (yellow/green) circuit between the light switch and the rear fog lamp. INSTALL a new rear fog lamp if necessary. Check for proper system operation.

AT10: CHECKING THE RIGHT REAR LAMP ASSEMBLY POWER SUPPLY CIRCUIT

1Enter the OFF position.

2Disconnect C430 right rear fog light.

3Enter the ON position.

4Turn on the REAR FOG LIGHTS.

5Measure the voltage between pin 1 of connector C430 right tail lamp assembly, circuit 15S-LG9 (BK/GN), harness side and ground.

• Is battery voltage registered?

→ Yes

Using the wiring diagrams, LOCATE and REPAIR the open in circuit 31-LG9 (Black) and 31-DA18 (Black) between the rear fog lamp assembly and ground point G46. INSTALL a new tail lamp assembly if necessary. Check for proper system operation.

→ No

Using the wiring diagrams, LOCATE and REPAIR the open in the 15S-LD6 (Yellow/Green) and 15S-LG9 (Black/Green) circuit between the light switch and the rear fog lamp. INSTALL a new rear lamp assembly if necessary. Check for proper system operation.

AU1: CHECKING THE LIGHT SWITCH

1Enter the OFF position.

2Disconnect the C320 light switch.

3Enter the ON position.

4Check the front fog lights.

• Are the front fog lights on?

→ Yes

Using the wiring diagrams, LOCATE and REPAIR the short to power in the electrical circuits connected to splice S110. Check for proper system operation.

→ No

INSTALL a new light switch. Check that the system operates correctly.

AV1: CHECKING THE LIGHT SWITCH

1Enter the OFF position.

2Disconnect the C320 light switch.

3Enter the ON position.

4Check the rear fog lights.

• Are the rear fog lights on?

→ Yes

Using the wiring diagrams, LOCATE and REPAIR the short to power in the electrical circuits connected to pin 2 of the C320 connector of the light switch. Check the correct operation of the system.

→ No

INSTALL a new light switch. Check that the system operates correctly.