ford Workshop Repair Guides

Ford Workshop Service and Repair Manuals

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Turn Signal and Hazard Lamps > < Headlamp Leveling

Focus RS 2003 (09.2002-)

Exterior Lighting - Stoplamps Focus RS 2003 (09/2002-)
Diagnosis and Testing

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

Special Tool(s)

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
  • Circuit(s)
  • Fuse
  • Bulb(s)
  • Plug loose, corroded or faulty
  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 stoplamps are inoperative
*
Bulb(s)
*
Fuse(s)
*
Circuit(s)
*
Stoplamp switch
*
GO to Pinpoint Test A.
One or more stoplamps are inoperative
*
Bulb(s)
*
Circuit(s)
*
Rear lamp assembly
*
High mounted stoplamp
*
GO to Pinpoint Test B.
The stoplamps are on continuously
*
Circuit(s)
*
Stoplamp switch
*
ABS module
*
GO to Pinpoint Test C.

Pinpoint Tests

PINPOINT TEST A : THE STOPLAMPS ARE INOPERATIVE
TEST CONDITIONS DETAILS/RESULTS/ACTIONS
A1: CHECK FUSE F42 (CJB)
1
Ignition switch in position 0.
2
Disconnect Fuse F42 (CJB).
3
CHECK Fuse F42 (15 A) (CJB).

Is the fuse OK
Yes
GO to A2.
No
INSTALL a new fuse F42 (15 A) and TEST the system for normal operation. If the fuse blows again, LOCATE and REPAIR the short to ground by using the wiring diagrams. TEST the system for normal operation.
A2: CHECK THE VOLTAGE AT FUSE F42 (CJB)
1
Connect Fuse F42 (CJB).
2
Ignition switch in position II.
3
Measure the voltage between F42 (CJB) and ground.

Is battery voltage indicated?
Yes
GO to A3.
No
LOCATE and REPAIR the power supply of fuse F42 (CJB) by using the wiring diagrams. If necessary INSTALL a new CJB. TEST the system for normal operation.
A3: CHECK THE VOLTAGE AT THE STOPLAMP SWITCH
1
Ignition switch in position 0.
2
Disconnect Stoplamp switch from connector C444.
3
Ignition switch in position II.

4
Measure the voltage between stoplamp switch, connector C444, Pin 3, circuit 15-LG23 (GN/WH), harness side and ground.

Is battery voltage indicated?
Yes
GO to A4.
No
LOCATE and REPAIR the open in circuit between fuse F42 (CJB) and stoplamp switch by using the wiring diagrams. TEST the system for normal operation.
A4: CHECK THE STOPLAMP SWITCH
1
Ignition switch in position 0.

2
Connect a fused jumper wire (15 A) at the stoplamp switch, connector C444, between pin 3, circuit 15-LG23 (GN/WH) and pin 1, circuit 15S-LG41B (GN/RD), harness side.
3
Ignition switch in position II.
4
Check the stoplamps.

Are the stoplamps illuminated?
Yes
INSTALL a new stoplamp switch. TEST the system for normal operation.
No
LOCATE and REPAIR the open in circuit between stoplamp switch and splice S154 by using the wiring diagrams. TEST the system for normal operation.

PINPOINT TEST B : ONE OR MORE STOPLAMPS ARE INOPERATIVE
TEST CONDITIONS DETAILS/RESULTS/ACTIONS
B1: DETERMINE THE FAULT CONDITION
1
Ignition switch in position II.
2
Switch on the STOPLAMPS.
3
Check the stoplamps.

Is the high mounted stoplamp inoperative?
Yes
GO to B2.
No
GO to B3.
B2: CHECK THE HIGH MOUNTED STOPLAMP
1
Ignition switch in position 0.
2
Disconnect High mounted stoplamp from connector C107.
3
Ignition switch in position II.
4
Switch on the STOPLAMPS.

5
Measure the voltage between high mounted stoplamp, connector C107, pin 1, circuit 15S-LG6 (GN/YE), harness side and ground.

Is battery voltage indicated?
Yes
LOCATE and REPAIR the open in circuit(s) between high mounted stoplamp and ground G35/G15 by using the wiring diagrams. If necessary INSTALL a new high mounted stoplamp. TEST the system for normal operation
No
LOCATE and REPAIR the open in circuit between splice S154 and high mounted stoplamp by using the wiring diagrams. If necessary INSTALL a new high mounted stoplamp. TEST the system for normal operation.
B3: DETERMINE THE FAULT CONDITION
1
Switch on the STOPLAMPS.
2
Check the stoplamps.

Are both stoplamps inoperative?
Yes
GO to B4.
No
-Left-hand side is inoperative: GO to B5.
-Right-hand side is inoperative: GO to B6.
B4: CHECK THE COMMON POWER SUPPLY OF THE STOPLAMPS
1
Ignition switch in position 0.
2
Disconnect Rear lamp assembly left-hand side from connector C472.
3
Ignition switch in position II.
4
Switch on the STOPLAMPS.

5
Measure the voltage between rear lamp assembly, left-hand side, connector C472, pin 2, circuit 15S-LG14A (GN/RD), harness side and ground.

Is battery voltage indicated?
Yes
LOCATE and REPAIR the open in circuit 31-DA18 (BK) between splice S184 and ground G46 by using the wiring diagrams. TEST the system for normal operation.
No
LOCATE and REPAIR the open in circuit 15S-LG14 (GN/RD) between splice S154 and splice S116 (rear lamp assemblies) by using the wiring diagrams. TEST the system for normal operation.
B5: CHECK THE POWER SUPPLY OF THE REAR LAMP ASSEMBLY LEFT-HAND SIDE
1
Ignition switch in position 0.
2
Disconnect Rear lamp assembly left-hand side from connector C472.
3
Ignition switch in position II.
4
Switch on the STOPLAMPS.

5
Measure the voltage between rear lamp assembly, left-hand side connector C472, pin 2, circuit 15S-LG14A (GN/RD), harness side and ground.

Is battery voltage indicated?
Yes
LOCATE and REPAIR the open in circuit 31-LF23 (BK) between rear lamp assembly and splice S184 by using the wiring diagrams. If necessary INSTALL a new rear lamp assembly. TEST the system for normal operation.
No
LOCATE and REPAIR the open in circuit between splice S116 and rear lamp assembly by using the wiring diagrams. If necessary INSTALL a new rear lamp assembly. TEST the system for normal operation.
B6: CHECK THE POWER SUPPLY OF THE REAR LAMP ASSEMBLY RIGHT-HAND SIDE
1
Ignition switch in position 0.
2
Disconnect Rear lamp assembly right-hand side from connector C473.
3
Ignition switch in position II.
4
Switch on the STOPLAMPS.

5
Measure the voltage between rear lamp assembly, right-hand side, connector C473, pin 2, circuit 15S-LG21 (GN/BK), harness side and ground.

Is battery voltage indicated?
Yes
LOCATE and REPAIR the open in circuit 31-LF24 (BK) between rear lamp assembly and splice S184 by using the wiring diagrams. If necessary INSTALL a new rear lamp assembly. TEST the system for normal operation.
No
LOCATE and REPAIR the open in circuit between splice S116 and rear lamp assembly by using the wiring diagrams. If necessary INSTALL a new rear lamp assembly. TEST the system for normal operation.

PINPOINT TEST C : THE STOPLAMPS ARE ON CONTINUOUSLY
TEST CONDITIONS DETAILS/RESULTS/ACTIONS
C1: CHECK THE STOPLAMP SWITCH
1
Ignition switch in position 0.
2
Disconnect Stoplamp switch from connector C444.
3
Ignition switch in position II.
4
Check the stoplamps.

Are the stoplamps illuminated?
Yes
GO to C2.
No
INSTALL a new stoplamp switch. TEST the system for normal operation.
C2: EXCLUDE THE SHORT TO POWER CONDITION POSSIBLY CAUSED BY ABS MODULE
1
Ignition switch in position 0.
2
Disconnect Fuse F21 (BJB).
3
Disconnect Fuse F11 (BJB).
4
Disconnect Fuse F46 (CJB).
5
Ignition switch in position II.
6
Check the stoplamps.

Are the stoplamps on continuously?
Yes
LOCATE and REPAIR the short to power in circuits connected with splice S2, S154 and S116 by using the wiring diagrams. TEST the system for normal operation.
No
INSTALL a new ABS module. TEST the system for normal operation.

Turn Signal and Hazard Lamps > < Headlamp Leveling