ford Workshop Repair Guides

Ford Workshop Service and Repair Manuals

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Fog Lamps - Vehicles Built From: 01-2002 > < Parking, Rear and License Plate Lamps - Vehicles Built From: 01-2002

Galaxy 2000.75 (04.2000-02.2006)

Exterior Lighting - Fog Lamps—Vehicles Built Up To: 12/2001 Galaxy 2000.75 (04/2000-02/2006)
Diagnosis and Testing

Refer to Wiring Diagrams Section 417-01, for schematic and connector information.

Special Tool(s)

Digital Multimeter

105-R0051 or equivalent

Terminal probe kit

29-011A

Inspection and Verification

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

Visual Inspection Chart

Electrical
  • Fuse(s)
  • Bulb(s)
  • Electrical connector(s)
  • Switch(es)
  • Wiring harness
  1. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
  1. If the concern is not visually evident, verify the symptom and refer to the Symptom Chart.

Symptom Chart

Symptom Chart

Symptom Possible Sources Action
The fog lamps are inoperative
*
Fuse(s)
*
Circuit(s)
*
Rear fog lamp cut-off relay
*
Trailer tow micro switch
*
Light switch
*
Central Junction Box (CJB)
*
GO to Pinpoint Test ??.
The individual fog lamp is inoperative (one fog lamp)
*
Circuit(s)
*
Front fog lamp
*
Tailgate lamp assembly
*
GO to Pinpoint Test ??.
The fog lamps are on continuously
*
Circuit(s)
*
Light switch
*
Tailgate lamps assembly
*
Trailer socket
*
GO to Pinpoint Test ??.

Pinpoint Tests

PINPOINT TEST A : THE FOG LAMPS ARE INOPERATIVE
TEST CONDITIONS DETAILS/RESULTS/ACTIONS
A1: DETERMINE THE FAULT CONDITION
1
Determine the fault condition.

Are the front fog lamps inoperative?
Yes
Rear fog lamps are OK: GO to A5.
Rear fog lamps are inoperative: GO to A2.
No
Rear fog lamps are inoperative:
- vehicles with detachable towbar: GO to A7.
- vehicles with fixed towbar: GO to A9.
- vehicles without towbar: GO to A12.
A2: CHECK FUSE F26 (CJB)
1
Ignition switch in position 0.
2
CHECK Fuse F26 (CJB).
3
Check fuse F26 (15 A).

Is the fuse OK?
Yes
GO to A3.
No
INSTALL a new fuse F26 (15 A) and TEST the system for normal operation. If the fuse blows again, LOCATE and REPAIR the short circuit by using the wiring diagrams. TEST the system for normal operation.
A3: CHECK THE VOLTAGE AT FUSE F26 (CJB)
1
Connect Fuse F26 (CJB).
2
Ignition switch in position II.
3
Measure the voltage between fuse F26 (15 A) and ground.

Is battery voltage indicated?
Yes
GO to A4.
No
LOCATE and REPAIR the open, in circuit between splice S8 and fuse F26, by using the wiring diagrams. If necessary INSTALL a new CJB. TEST the system for normal operation.
A4: CHECK THE VOLTAGE AT THE LIGHT SWITCH
1
Ignition switch in position 0.
2
Disconnect Light switch C168.
3
Ignition switch in position II.

4
Measure the voltage between light switch, connector C168, pin 2, circuit (GY/YE), harness side and ground.

Is battery voltage indicated?
Yes
CHECK the light switch according to the Component Test attached to procedure Headlamps, if necessary INSTALL a new one. TEST the system for normal operation.
No
LOCATE and REPAIR the open, in circuit between fuse F26 and light switch, by using the wiring diagrams. If necessary INSTALL a new CJB. TEST the system for normal operation.
A5: CHECK THE VOLTAGE AT THE FRONT FOG LAMP
1
Ignition switch in position 0.
2
Disconnect Front fog lamp right-hand side C379.
3
Ignition switch in position II.
4
Turn on the FRONT FOG LAMPS.

5
Measure the voltage between front fog lamp right-hand side, connector C379, pin 1, circuit (GY/YE), harness side and ground.

Is battery voltage indicated?
Yes
REPAIR the open circuit (BN), between splice S87 and ground G5, by using the wiring diagrams. TEST the system for normal operation.
No
GO to A6.
A6: CHECK CIRCUIT BETWEEN LIGHT SWITCH AND FOG LAMP FOR OPEN
1
Ignition switch in position 0.
2
Disconnect Light switch C168.

3
Measure the resistance between front fog lamp right-hand side, connector C379, pin 1, circuit (GY/YE), harness side and light switch, connector C168, pin 8, circuit (GY/BN), harness side.

Is the resistance less than 2 ohms?
Yes
CHECK the light switch according to the Component Test attached to procedure Headlamps, if necessary INSTALL a new one. TEST the system for normal operation.
No
REPAIR the open circuit (GY/BN), between light switch and splice S86, by using the wiring diagrams. TEST the system for normal operation.
A7: CHECK THE VOLTAGE AT THE TRAILER SOCKET
1
Ignition switch in position II.
2
Turn on the REAR FOG LAMPS.

3
Measure the voltage between trailer socket, socket C350, pin 2, circuit (GY) and ground.

Is battery voltage indicated?
Yes
GO to A12.
No
GO to A8.
A8: CHECK THE CIRCUIT BETWEEN LIGHT SWITCH AND TRAILER SOCKET FOR OPEN
1
Ignition switch in position 0.
2
Disconnect Light switch C168.

3
Measure the resistance between light switch, connector C168, pin 9, circuit (GY), harness side and trailer socket, socket C350, pin 2, circuit (GY).

Is the resistance less than 2 ohms?
Yes
CHECK the light switch according to the Component Test attached to procedure Headlamps, if necessary INSTALL a new one. TEST the system for normal operation.
No
REPAIR the open circuit (GY), between light switch and trailer socket, by using the wiring diagrams. TEST the system for normal operation.
A9: CHECK THE VOLTAGE AT THE TRAILER SOCKET
1
Ignition switch in position II.
2
Turn on the REAR FOG LAMPS.

3
Measure the voltage between
  • 7-pin trailer socket C557, pin 2, circuit (RD/YE) and ground.
  • 13-pin trailer socket C605, pin 2, circuit (RD/YE) and ground.

Is battery voltage indicated?
Yes
GO to A12.
No
GO to A10.
A10: CHECK THE VOLTAGE AT THE REAR FOG LAMP CUT-OFF RELAY
1
Ignition switch in position 0.
2
Disconnect Rear fog lamp cut-off relay C552.
3
Ignition switch in position II.
4
Turn on the REAR FOG LAMPS.

5
Measure the voltage between rear fog lamp cut-off relay, socket C552, circuit (RD/WH), harness side and ground.

Is battery voltage indicated?
Yes
INSTALL a new rear fog lamp cut-off relay. TEST the system for normal operation.
No
GO to A11.
A11: CHECK THE CIRCUIT BETWEEN LIGHT SWITCH AND REAR FOG LAMP CUT-OFF RELAY FOR OPEN
1
Ignition switch in position 0.
2
Disconnect Light switch C168.

3
Measure the resistance between light switch, connector C168, pin 9, circuit (GY), harness side and rear fog lamp cut-off relay, connector C552, circuit (RD/WH), harness side.

Is the resistance less than 2 ohms?
Yes
CHECK the light switch according to the Component Test attached to procedure Headlamps, if necessary INSTALL a new one. TEST the system for normal operation.
No
REPAIR the open circuit (GY) resp. (RD/WH), between light switch and rear fog lamp cut-off relay, by using the wiring diagrams. TEST the system for normal operation.
A12: CHECK THE VOLTAGE AT THE REAR FOG LAMP
1
Ignition switch in position 0.
2
Disconnect Tailgate lamp assembly left-hand side C285.
3
Ignition switch in position II.
4
Turn on the REAR FOG LAMPS.

5
Measure the voltage between tailgate lamp assembly left-hand side, connector C285, pin 3, circuit (GY/WH), harness side and ground.

Is battery voltage indicated?
Yes
REPAIR the circuit (BN), between splice S66 and ground G8, by using the wiring diagrams. TEST the system for normal operation.
No
Vehicles without towbar: GO to A13.
Vehicles with fixed towbar: GO to A14.
Vehicles with detachable towbar: GO to A15.
A13: CHECK THE CIRCUIT BETWEEN LIGHT SWITCH AND REAR FOG LAMPS FOR OPEN
1
Ignition switch in position 0.
2
Disconnect Light switch C168.

3
Measure the resistance between light switch, connector C168, pin 9, circuit (GY), harness side and tailgate assembly left-hand side, connector C285, pin 3, circuit (GY/WH), harness side.

Is the resistance less than 2 ohms?
Yes
CHECK the light switch according to the Component Test attached to procedure Headlamps, if necessary INSTALL a new one. TEST the system for normal operation.
No
REPAIR the open circuit (GY) resp. (GY/WH), between light switch and splice S89, by using the wiring diagrams. TEST the system for normal operation.
A14: CHECK THE REAR FOG LAMP CUT-OFF RELAY
1
Ignition switch in position 0.
2
Connect Tailgate lamp assembly left-hand side C285.

3
Connect a fused jumper wire (15 A) at the rear fog lamp cut-off relay, socket C552, between circuit (RD/WH) and circuit (VT/YE), harness side.
4
Ignition switch in position II.
5
Turn on the REAR FOG LAMPS.
6
CHECK the rear fog lamps.

Do the rear fog lamps illuminate?
Yes
INSTALL a new rear fog lamp cut-off relay. TEST the system for normal operation.
No
REPAIR the open circuit (VT/YE) resp. (GY/WH), between rear fog lamp cut-off relay and splice S89, by using the wiring diagrams. TEST the system for normal operation.
A15: CHECK THE CIRCUIT BETWEEN TRAILER SOCKET AND TRAILER TOW MICRO SWITCH FOR OPEN
1
Ignition switch in position II.
2
Turn on the REAR FOG LAMPS.

3
Measure the voltage between trailer tow micro switch, connector C365, pin 3, circuit (GY), harness side and ground.

Is battery voltage indicated?
Yes
GO to A16.
No
REPAIR the open circuit (GY), between trailer socket and trailer tow micro switch, by using the wiring diagrams. TEST the system for normal operation.
A16: CHECK THE TRAILER TOW MICRO SWITCH
1
Ignition switch in position 0.
2
Connect Tailgate lamp assembly left-hand side C285.

3
Connect a fused jumper wire (15 A) at the trailer tow micro switch, connector C365, between pin 3, circuit (GY) and pin 1, circuit (GY/WH), harness side.
4
Ignition switch in position II.
5
Turn on the REAR FOG LAMPS.
6
CHECK the rear fog lamps.

Do the rear fog lamps illuminate?
Yes
INSTALL a new trailer tow micro switch. TEST the system for normal operation.
No
REPAIR the open circuit (GY/WH), between trailer tow micro switch and splice S89, by using the wiring diagrams. TEST the system for normal operation.

PINPOINT TEST B : THE INDIVIDUAL FOG LAMP IS INOPERATIVE (ONE FOG LAMP)
TEST CONDITIONS DETAILS/RESULTS/ACTIONS
B1: DETERMINE FAULT CONDITION
1
Determine the fault condition.

Is one front fog lamp inoperative?
Yes
GO to B2.
No
One rear fog lamp is inoperative: GO to B4.
B2: CHECK THE VOLTAGE AT THE RESPECTIVE FRONT FOG LAMP
1
Ignition switch in position 0.
2
Disconnect Front fog lamp C382 (left-hand side) resp. C379 (right-hand side).
3
Ignition switch in position II.
4
Turn on the FRONT FOG LAMPS.

5
Measure the voltage between front fog lamp, connector C382 (left-hand side) resp. C379 (right-hand side), pin 1, circuit (GY/YE), harness side and ground.

Is battery voltage indicated?
Yes
GO to B3.
No
REPAIR the open circuit (GY/YE), between splice S86 and front fog lamp, by using the wiring diagrams. TEST the system for normal operation.
B3: CHECK THE GROUND CONNECTION OF THE RESPECTIVE FRONT FOG LAMP
1
Ignition switch in position 0.

2
Measure the resistance between front fog lamp, connector C382 (left-hand side) resp. C379 (right-hand side), pin 2, circuit (BN), harness side and ground.

Is the resistance less than 2 ohms?
Yes
CHECK the front fog lamp, if necessary INSTALL a new one. TEST the system for normal operation.
No
REPAIR the open circuit (BN), between front fog lamp and splice S87, by using the wiring diagrams. TEST the system for normal operation.
B4: CHECK THE VOLTAGE AT THE RESPECTIVE REAR FOG LAMP
1
Ignition switch in position 0.
2
Disconnect Tailgate lamp assembly C285 (left-hand side) resp. C182 (right-hand side).
3
Ignition switch in position II.
4
Turn on the REAR FOG LAMPS.

5
Measure the voltage between tailgate lamp assembly, connector C285 (left-hand side) resp. C182 (right-hand side), pin 3, circuit (GY/WH), harness side and ground.

Is battery voltage indicated?
Yes
GO to B5.
No
REPAIR the open circuit (GY/WH), between splice S89 and tailgate lamp assembly, by using the wiring diagrams. TEST the system for normal operation.
B5: CHECK THE GROUND CONNECTION OF THE RESPECTIVE REAR FOG LAMP
1
Ignition switch in position 0.

2
Measure the resistance between rear fog lamp, connector C285 (left-hand side) resp. C182 (right-hand side), pin 1, circuit (BN), harness side and ground.

Is the resistance less than 2 ohms?
Yes
CHECK the tailgate lamp assembly, if necessary INSTALL a new one. TEST the system for normal operation.
No
REPAIR open circuit (BN), between tailgate lamp assembly and splice S66, by using the wiring diagrams. TEST the system for normal operation.

PINPOINT TEST C : THE FOG LAMPS ARE ON CONTINUOUSLY
TEST CONDITIONS DETAILS/RESULTS/ACTIONS
C1: DETERMINE THE FAULT CONDITION
1
Ignition switch in position II.
2
Turn off the FOG LAMPS.
3
Check the fog lamps.

Are the front and rear fog lamps illuminated?
Yes
CHECK the light switch according to the Component Test attached to procedure Headlamps, if necessary INSTALL a new one. TEST the system for normal operation.
No
Front fog lamps are illuminated: GO to C2.
Rear fog lamps are illuminated:
- vehicles without towbar: GO to C4.
- vehicles with towbar: GO to C3.
C2: CHECK THE LIGHT SWITCH
1
Ignition switch in position 0.
2
Disconnect Light switch C168.
3
Ignition switch in position II.
4
Check the front fog lamps.

Are the front fog lamps illuminated?
Yes
LOCATE and REPAIR the short to power, in circuits connected with splice S86, by using the wiring diagrams. If necessary INSTALL a new fog lamp. TEST the system for normal operation.
No
CHECK the light switch according to the Component Test attached to procedure Headlamps, if necessary INSTALL a new one. TEST the system for normal operation.
C3: ISOLATE THE SHORT TO POWER CIRCUIT
1
Ignition switch in position 0.
2
Disconnect Rear fog lamp cut-off relay C552 resp. Trailer tow micro switch C365.
3
Ignition switch in position II.
4
Check the rear fog lamps.

Are the rear fog lamps illuminated?
Yes
LOCATE and REPAIR the short to power, in circuits (VT/YE) resp. (GY/WH) connected with splice S89, by using the wiring diagrams. If necessary INSTALL a new tailgate lamp assembly. TEST the system for normal operation.
No
GO to C4.
C4: CHECK THE LIGHT SWITCH
1
Ignition switch in position 0.
2
Disconnect Light switch C168.
3
Ignition switch in position II.
4
Check the rear fog lamps.

Are the rear fog lamps illuminated?
Yes
Vehicles with fixed towbar: LOCATE and REPAIR the short to power, in circuits (GY) resp. (RD/WH) connected with splice S88, by using the wiring diagrams. If necessary INSTALL a new trailer socket. TEST the system for normal operation.
Vehicles with detachable towbar: LOCATE and REPAIR the short to power, in circuits (GY) connected with splice S88, by using the wiring diagrams. TEST the system for normal operation.
Vehicles without towbar: LOCATE and REPAIR the short to power, in circuits (GY) resp. (GY/WH) connected with splice S88 and splice S89, by using the wiring diagrams. If necessary INSTALL a new tailgate lamp assembly. TEST the system for normal operation.
No
CHECK the light switch according to the Component Test attached to procedure Headlamps, if necessary INSTALL a new one. TEST the system for normal operation.

Fog Lamps - Vehicles Built From: 01-2002 > < Parking, Rear and License Plate Lamps - Vehicles Built From: 01-2002