ford Workshop Repair Guides

Ford Workshop Service and Repair Manuals

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Trailer Lamps > < Headlamp Leveling

S-MAX.Galaxy 2006.5 (03.2006-)

Exterior Lighting - Parking, Rear and License Plate Lamps S-MAX/Galaxy 2006.5 (03/2006-)
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 Testing

NOTE:
NOTE:The generic electronic module (GEM) is part of the central junction box (CJB).
NOTE:
NOTE:A new GEM needs to be configured after installation. For this purpose, the vehicle-specific data are read out of the module to be changed using WDS and is transferred to the new module. REFER to:
Module Configuration (418-01 Module Configuration, General Procedures),
Zentralelektrikmodul (GEM) (419-10 Multifunktionsmodule, Diagnosis and Testing).
NOTE:
NOTE:Before reading out the vehicle-specific data make sure that all electrical connections in the vehicle are reconnected so that the module and WDS can communicate correctly.
  1. Verify the customer concern.
  1. Visually inspect for obvious signs of electrical damage.

Visual Inspection Chart

Electrical
  • Fuse(s)
  • Bulb(s)
  • Connector
  • Switch
  • Wiring loom
  1. Resolve any obvious causes or concerns found during the visual inspection before carrying out any further tests.
  1. If the cause of the concern cannot be found by visual inspection, continue with the symptom chart.

Symptom chart

Symptom chart

Symptom Possible Sources Action
All parking lamps inoperative
*
Fuse(s)
*
Circuit(s)
*
Ignition switch
*
LCM (Lights Control Module)
*
Central Junction Box (CJB)
*
GO to Pinpoint Test A.
One parking, rear or license lamp(s) is inoperative
*
Fuse(s)
*
Circuit(s)
*
LCM (Lights Control Module)
*
License plate lamp
*
Rear lamp unit
*
Conventional Headlamps
*
Xenon headlamp
*
Central Junction Box (CJB)
*
GO to Pinpoint Test B.
All or one parking lamp(s), tail lamp(s) or licence plate lamp(s) is/are permanently lit
*
Circuit(s)
*
LCM (Lights Control Module)
*
Trailer socket
*
Central Junction Box (CJB)
*
GO to Pinpoint Test C.

Pinpoint test

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

PINPOINT TEST A : ALL PARKING LAMPS INOPERATIVE
TEST CONDITIONS DETAILS/RESULTS/ACTIONS
A1: CHECK FUSE F17 (60 A) (EJB)
1
Ignition switch in position 0.
2
Disconnect fuse F17 (60 A) (EJB).
3
CHECK fuse F17 (60 A) (EJB).

Is the fuse OK.?
Yes
GO to A2.
No
RENEW fuse F17 (60 A) (EJB) and CHECK the operation of the system. If the fuse blows again, LOCATE and RECTIFY the short to ground using the Wiring Diagrams. CHECK system operates correctly
A2: CHECK FUSE F18 (60 A) (EJB)
1
Disconnect fuse F18 (60 A) (EJB).
2
CHECK fuse F18 (60 A) (EJB).

Is the fuse OK.?
Yes
GO to A3.
No
RENEW fuse F18 (60 A) (EJB) and CHECK the operation of the system. If the fuse blows again, LOCATE and RECTIFY the short to ground using the Wiring Diagrams. CHECK system operates correctly
A3: CHECK THE GROUND CONNECTION OF THE LIGHTS CONTROL MODULE FOR OPEN CIRCUIT
1
Ignition switch in position 0.
2
Disconnect Connector C2LF23D from lighting control module.

3
Measure the resistance between the lights control module, connector C2LF23D, pin 5, circuit GD133BT (BK), wiring harness side and ground.

Is a resistance of less than 2 Ohm registered?
Yes
GO to A4.
No
LOCATE AND RECTIFY the break in the circuits between the lights control module and ground connection G3D134 with the aid of the Wiring Diagrams. CHECK system operates correctly
A4: CHECK THE VOLTAGE SUPPLY TO THE SMART JUNCTION BOX FOR OPEN CIRCUIT
1
Ignition switch in position 0.
2
Disconnect Smart Junction Box from connector C1BP02G.

3
Measure the voltage between the Smart Junction Box, connector C1BP02G, pin 1, circuit SBB17A (RD), wiring harness side and ground.
4
Ignition switch in position II.

Does the meter display battery voltage?
Yes
GO to A5.
No
LOCATE and RECTIFY the break in the circuits between fuse F17 (60 A) (EJB) and the Smart Junction Box with the aid of the wiring diagrams. CHECK system operates correctly
A5: CHECK THE GROUND CONNECTION TO THE SMART JUNCTION BOX FOR OPEN CIRCUIT
1
Ignition switch in position 0.
2
Disconnect Smart Junction Box from connector C1BP02A.

3
Measure the resistance between the Smart Junction Box, connector C1BP02A, pin 54, circuit GD123F (BK/GY), wiring harness side and ground.

Is a resistance of less than 2 Ohm registered?
Yes
GO to A6.
No
LOCATE and RECTIFY the break in the circuits between the Smart Junction Box and ground connection G1D132B with the aid of the Wiring Diagrams. CHECK system operates correctly
A6: RULE OUT THE LIGHTS CONTROL MODULE AS A POSSIBLE CAUSE OF THE FAULT
1
Connect Smart Junction Box from connector C1BP02A.
2
Connect Smart Junction Box from connector C1BP02G.

Are all parking lamps lit?
Yes
INSTALL A NEW lights control module. CHECK system operates correctly
No
CHECK the Smart Junction Box with the aid of the diagnostic unit and INSTALL a new one if necessary. CHECK system operates correctly

PINPOINT TEST B : ONE PARKING, REAR OR LICENSE LAMP(S) IS INOPERATIVE
TEST CONDITIONS DETAILS/RESULTS/ACTIONS
B1: DETERMINE CONDITIONS UNDER WHICH THE FAULT OCCURS
1
SWITCH ON the parking lamps.
2
CHECK parking lamps and license plate lamps.

Are both parking lamps inoperative?
Yes
GO to Pinpoint Test A.
No
- Both license plate lamps inoperative: GO to B2.
- One license plate lamp inoperative: GO to B4.
- Front left parking lamp inoperative: GO to B6.
- Front right parking lamp inoperative: GO to B9.
- Both rear lamps on the left-hand side inoperative: GO to B12.
- Rear lamp (rear lamp assembly) on the left-hand side inoperative: GO to B14.
- Rear lamp (tailgate) on the left-hand side inoperative: GO to B15.
- Both rear lamps on the right-hand side inoperative: GO to B17.
- Rear lamp (rear lamp assembly) on the right-hand side inoperative: GO to B18.
- Rear lamp (tailgate) on the right-hand side inoperative: GO to B20.
B2: CHECK THE COMMON POWER SUPPLY OF THE LICENSE PLATE LAMPS FOR OPEN
1
Ignition switch in position 0.
2
Disconnect left-hand license plate lamp from connector C4LS04.
3
Ignition switch in position II.
4
SWITCH ON the parking lamps.
5
Measure the voltage between the left-hand license plate lamp, connector C4LS04, pin 1, circuit CLS04C (YE/VT), wiring harness side and ground.

Does the meter display battery voltage?
Yes
LOCATE and RECTIFY the break in the circuits between soldered connection SP534 and ground connection G4D149 with the aid of the Wiring Diagrams. CHECK system operates correctly
No
GO to B3.
B3: CHECK THE COMMON POWER SUPPLY OF THE LICENSE PLATE LAMPS FOR OPEN
1
Ignition switch in position 0.
2
Disconnect Smart Junction Box from connector C1BP02B.
3
Measure the resistance between the Smart Junction Box, connector C1BP02B, pin 52, circuit CLS04B (YE/VT), wiring harness side and the left-hand license plate lamp, connector C4LS04, pin 1, circuit CLS04C (YE/VT), wiring harness side.

Is a resistance of less than 2 Ohm registered?
Yes
INSTALL A NEW Smart Junction Box. CHECK system operates correctly
No
LOCATE and RECTIFY the break in the circuits between the Smart Junction Box and soldered connection SP400 with the aid of the Wiring Diagrams. CHECK system operates correctly
B4: CHECK THE POWER SUPPLY TO THE LICENSE PLATE LAMP FOR OPEN CIRCUIT
1
Ignition switch in position 0.
2
Disconnect License plate lamp.
  • left: from connector C4LS04
  • right: from connector C4LS05
3
Ignition switch in position II.
4
SWITCH ON the parking lamps.
5
Measure the voltage between license plate lamp:
  • left: Connector C4LS04, pin 1, circuit CLS04C (YE/VT), wiring harness side and ground.
  • right: Connector C4LS05, pin 1, circuit CLS04D (YE/VT), wiring harness side and ground.

Does the meter display battery voltage?
Yes
GO to B5.
No
LOCATE and RECTIFY the break in the circuit between soldered connection SP400 and the license plate lamp with the aid of the Wiring Diagrams. CHECK system operates correctly
B5: CHECK THE GROUND CONNECTION OF THE LICENSE PLATE LAMP FOR OPEN CIRCUIT
1
Ignition switch in position 0.
2
Measure the resistance between the license plate lamp:
  • left: connector C4LS04, pin 2, circuit GD150M (BK/WH), wiring harness side and ground.
  • right: connector C4LS05, pin 2, circuit GD150U (BK/WH), wiring harness side and ground.

Is a resistance of less than 2 Ohm registered?
Yes
RENEW the license plate lamp. CHECK system operates correctly
No
LOCATE and RECTIFY the break in the circuits between the license plate lamp and soldered connection SP534 with the aid of the Wiring Diagrams. CHECK system operates correctly
B6: CHECK THE VOLTAGE SUPPLY TO THE FRONT LEFT-HAND PARKING LIGHT FOR OPEN CIRCUIT
1
Ignition switch in position 0.
2
Disconnect Left-hand front fog lamp unit from connector C1LS06.
3
Ignition switch in position II.
4
SWITCH ON the parking lamps.
5
Measure the voltage between the left-hand parking lamp, connector C1LS06, pin 1:
  • Vehicles with body code vehicle identification number (VIN) S: circuit CLS13B (YE/BU), wiring harness side and ground.
  • All other vehicles: circuit CLS13C (YE/BU), wiring harness side and ground.

Does the meter display battery voltage?
Yes
GO to B8.
No
GO to B7.
B7: CHECK THE VOLTAGE SUPPLY TO THE FRONT LEFT-HAND PARKING LIGHT FOR OPEN CIRCUIT
1
Ignition switch in position 0.
2
Disconnect Smart Junction Box from connector C1BP02A.
3
Measure the resistance between the Smart Junction Box, connector C1BP02A, pin 39, circuit CLS13B (YE/BU), wiring harness side and the front fog lamp unit C1LS06, pin 1:
  • Vehicles with body code vehicle identification number (VIN) S: circuit CLS13B (YE/BU), wiring harness side and ground.
  • All other vehicles: circuit CLS13C (YE/BU), wiring harness side and ground.

Is a resistance of less than 2 Ohm registered?
Yes
INSTALL A NEW Smart Junction Box. CHECK system operates correctly
No
LOCATE and RECTIFY the break in the circuits between the Smart Junction Box and the front fog lamp unit with the aid of the Wiring Diagrams. CHECK system operates correctly
B8: CHECK THE GROUND CONNECTION OF THE LEFT-HAND FRONT PARKING LAMP FOR OPEN CIRCUIT
1
Ignition switch in position 0.
2
Measure the resistance between the parking lamp, connector C1LS06, pin 2:
  • Vehicles with body code vehicle identification number (VIN) S: circuit GD130AR (BK/YE), wiring harness side and ground.
  • All other vehicles: circuit GD130AT (BK/YE), wiring harness side and ground.

Is a resistance of less than 2 Ohm registered?
Yes
CHECK and RENEW the front fog lamp unit. CHECK system operates correctly
No
LOCATE and RECTIFY the break in the circuit between the front fog lamp unit and soldered connection SP371 with the aid of the Wiring Diagrams. CHECK system operates correctly
B9: CHECK THE VOLTAGE SUPPLY TO THE RIGHT-HAND FRONT PARKING LAMP FOR OPEN CIRCUIT
1
Ignition switch in position 0.
2
Disconnect Right-hand front fog lamp unit from connector C1LS07.
3
Ignition switch in position II.
4
SWITCH ON the parking lamps.
5
Measure the voltage between the right-hand parking lamp, connector C1LS07, pin 1, circuit CLS07B (BN/YE), wiring harness side and ground.

Does the meter display battery voltage?
Yes
GO to B11.
No
GO to B10.
B10: CHECK THE VOLTAGE SUPPLY TO THE RIGHT-HAND FRONT PARKING LAMP FOR OPEN CIRCUIT
1
Ignition switch in position 0.
2
Disconnect Smart Junction Box from connector C1BP02A.
3
Measure the resistance between the parking lamp, connector C1LS07, pin 1, circuit CLS07B (BN/YE), wiring harness side and the Smart Junction Box, connector C1BP02A, pin 40, circuit CLS07B (BN/YE), wiring harness side.

Is a resistance of less than 2 Ohm registered?
Yes
INSTALL A NEW Smart Junction Box. CHECK system operates correctly
No
LOCATE and RECTIFY the break in the circuits between the Smart Junction Box and the front fog lamp unit with the aid of the Wiring Diagrams. CHECK system operates correctly
B11: CHECK THE GROUND CONNECTION OF THE RIGHT-HAND FRONT PARKING LIGHT FOR OPEN CIRCUIT
1
Ignition switch in position 0.
2
Measure the resistance between the parking lamp, connector C1LS07, pin 2, circuit GD132S (BK/VT), wiring harness side and ground.

Is a resistance of less than 2 Ohm registered?
Yes
CHECK and RENEW the front fog lamp unit. CHECK system operates correctly
No
LOCATE and RECTIFY the break in the circuit between the front fog lamp unit and soldered connection SP380 with the aid of the Wiring Diagrams. CHECK system operates correctly
B12: CHECK THE SHARED VOLTAGE SUPPLY OF THE LEFT-HAND REAR PARKING LAMPS FOR OPEN CIRCUIT
1
Ignition switch in position 0.
2
Disconnect Left-hand rear lamp assembly from connector C4LS18A.
3
Ignition switch in position II.
4
SWITCH ON the parking lamps.

5
Measure the voltage between the left-hand rear lamp assembly, connector C4LS18A, pin 2, circuit CLS08A (VT/GN)/CLS08C (VT/GN), wiring harness side and ground.

Does the meter display battery voltage?
Yes
LOCATE and RECTIFY the break in the circuits between soldered connection SP549 and ground connection G4D149 with the aid of the Wiring Diagrams. CHECK system operates correctly
No
GO to B13.
B13: CHECK THE SHARED VOLTAGE SUPPLY OF THE LEFT-HAND REAR PARKING LAMPS FOR OPEN CIRCUIT
1
Ignition switch in position 0.
2
Disconnect Smart Junction Box from connector C1BP02B.

3
Measure the resistance between the left-hand rear lamp assembly, connector C4LS18A, pin 2, circuit CLS08A (VT/GN)/CLS08C (VT/GN), wiring harness side and the Smart Junction Box, connector C1BP02B, pin 50, circuit CLS08A (VT/GN), wiring harness side.

Is a resistance of less than 2 Ohm registered?
Yes
INSTALL A NEW Smart Junction Box. CHECK system operates correctly
No
LOCATE and RECTIFY the break in the circuits between the Smart Junction Box and the rear lamp assembly with the aid of the Wiring Diagrams. CHECK system operates correctly
B14: CHECK THE GROUND CONNECTION OF THE LEFT-HAND REAR LAMP (LAMP ASSEMBLY) FOR OPEN CIRCUIT
1
Ignition switch in position 0.
2
Disconnect Rear lamp (lamp assembly) from connector C4LS18A.

3
Measure the resistance between the left-hand rear lamp (lamp assembly), connector C4LS18A, pin 3, circuit GD150C (BK/WH), wiring harness side and ground.

Is a resistance of less than 2 Ohm registered?
Yes
INSTALL A NEW rear lamp (lamp assembly). CHECK system operates correctly
No
LOCATE and RECTIFY the break in the circuits between the rear lamp (lamp assembly) and soldered connection SP549 with the aid of the Wiring Diagrams. CHECK system operates correctly
B15: CHECK THE VOLTAGE SUPPLY OF THE LEFT-HAND REAR LAMP (TAILGATE) FOR OPEN CIRCUIT
1
Ignition switch in position 0.
2
Disconnect Rear lamp (tailgate) from connector C4LS35.
3
Ignition switch in position II.
4
SWITCH ON the parking lamps.

5
Measure the voltage between the left-hand rear lamp (tailgate), connector C4LS35, pin 3, circuit CLS08B (VT/GN), wiring harness side and ground.

Does the meter display battery voltage?
Yes
GO to B16.
No
LOCATE and RECTIFY the break in the circuits between the rear lamp (lamp assembly) and the rear lamp (tailgate) with the aid of the Wiring Diagrams. CHECK system operates correctly
B16: CHECK THE GROUND CONNECTION OF THE LEFT-HAND REAR LAMP (TAILGATE) FOR OPEN CIRCUIT
1
Ignition switch in position 0.

2
Measure the resistance between the left-hand rear lamp (tailgate), connector C4LS35, pin 2, circuit GD150P (BK/WH), wiring harness side and ground.

Is a resistance of less than 2 Ohm registered?
Yes
INSTALL A NEW rear lamp (tailgate). CHECK system operates correctly
No
LOCATE and RECTIFY the break in the circuits between the rear lamp (tailgate) and soldered connection SP534 with the aid of the Wiring Diagrams. CHECK system operates correctly
B17: CHECK THE SHARED VOLTAGE SUPPLY OF THE RIGHT-HAND REAR LAMPS FOR OPEN CIRCUIT
1
Ignition switch in position 0.
2
Disconnect Smart Junction Box from connector C1BP02B.

3
Measure the resistance between the Smart Junction Box, connector C1BP02B, pin 51, circuit CLS09A (WH/OG), wiring harness side and ground.

Is a resistance of less than 10,000 Ohm registered?
Yes
INSTALL A NEW Smart Junction Box. CHECK system operates correctly
No
LOCATE and RECTIFY the break in the circuits between the Smart Junction Box and soldered connection SP568 with the aid of the Wiring Diagrams. CHECK system operates correctly
B18: CHECK THE VOLTAGE SUPPLY TO THE RIGHT-HAND REAR LAMP (LAMP ASSEMBLY) FOR OPEN CIRCUIT
1
Ignition switch in position 0.
2
Disconnect Rear lamp (lamp assembly) from connector C4LS19A.
3
Ignition switch in position II.
4
SWITCH ON the parking lamps.

5
Measure the voltage between the rear lamp unit (lamp assembly), connector C4LS19A, pin 2, circuit CLS09B (WH/OG), wiring harness side and ground.

Does the meter display battery voltage?
Yes
GO to B19.
No
LOCATE and RECTIFY the break in the circuit between soldered connection SP568 and the rear lamp unit (lamp assembly) with the aid of the Wiring Diagrams. CHECK system operates correctly
B19: CHECK THE GROUND CONNECTION OF THE RIGHT-HAND REAR LAMP (LAMP ASSEMBLY) FOR OPEN CIRCUIT
1
Ignition switch in position 0.

2
Measure the resistance between the right-hand rear lamp unit (lamp assembly), connector C4LS19A, pin 3, circuit GD152A (BK/BU), wiring harness side and ground.

Is a resistance of less than 2 Ohm registered?
Yes
INSTALL A NEW rear lamp unit (lamp assembly). CHECK system operates correctly
No
LOCATE and RECTIFY the break in the circuits between the rear lamp unit (lamp assembly) and soldered connection SP600 with the aid of the Wiring Diagrams. CHECK system operates correctly
B20: CHECK THE VOLTAGE SUPPLY TO THE RIGHT-HAND REAR LAMP (TAILGATE) FOR OPEN CIRCUIT
1
Ignition switch in position 0.
2
Disconnect Rear lamp unit (tailgate) from connector C4LS36.
3
Ignition switch in position II.
4
SWITCH ON the parking lamps.

5
Measure the voltage between the right-hand rear lamp unit (tailgate), connector C4LS36, pin 3, circuit CLS09F (WH/OG), wiring harness side and ground.

Does the meter display battery voltage?
Yes
GO to B21.
No
LOCATE and RECTIFY the break in the circuits between soldered connection SP568 and the rear lamp unit (tailgate) with the aid of the Wiring Diagrams. CHECK system operates correctly
B21: CHECK THE GROUND CONNECTION AT THE RIGHT-HAND REAR LAMP (TAILGATE) FOR OPEN CIRCUIT
1
Ignition switch in position 0.

2
Measure the resistance between the right-hand rear lamp unit (tailgate), connector C4LS36, pin 2, circuit GD150W (BK/WH), wiring harness side and ground.

Is a resistance of less than 2 Ohm registered?
Yes
INSTALL A NEW rear lamp unit (tailgate). CHECK system operates correctly
No
LOCATE and RECTIFY the break in the circuit between the rear lamp unit (tailgate) and soldered connection SP534 with the aid of the Wiring Diagrams. CHECK system operates correctly

PINPOINT TEST C : ALL OR ONE PARKING LAMP(S), TAIL LAMP(S) OR LICENCE PLATE LAMP(S) IS/ARE PERMANENTLY LIT
TEST CONDITIONS DETAILS/RESULTS/ACTIONS
C1: DETERMINE CONDITIONS UNDER WHICH THE FAULT OCCURS
1
Ignition switch in position II.
2
CHECK the parking lamps.

Are all parking lamps permanently lit?
Yes
GO to C2.
No
- Left-hand front parking lamp permanently lit: GO to C10.
- Right-hand front parking lamp permanently lit: GO to C10.
- Left-hand rear parking lamps permanently lit: GO to C11.
- Right-hand rear parking lamps permanently lit: GO to C11.
- License plate lamps permanently lit: GO to C12.
C2: DETERMINE VEHICLE EQUIPMENT LEVEL
1
Find out whether the vehicle is fitted with the daytime running lamps (DRL) option.

Does the vehicle have daytime running lamps (DRL)?
Yes
CHECK the software configuration of the GEM with the aid of WDS, and update it if necessary. CHECK system operates correctly If the concern persists: GO to C3.
No
GO to C3.
C3: CHECK FUSE F33 (5 A) (EJB)
1
Ignition switch in position 0.
2
Disconnect fuse F33 (5 A) (EJB).
3
CHECK fuse F33 (5 A) (EJB).

Is the fuse OK.?
Yes
GO to C4.
No
RENEW fuse F33 (5 A) (EJB) and CHECK the operation of the system. If the fuse blows again, LOCATE and RECTIFY the short to ground using the Wiring Diagrams. CHECK system operates correctly
C4: CHECK THE VOLTAGE SUPPLY TO FUSE F17 (60 A) (EJB) FOR OPEN CIRCUIT
1
Ignition switch in position II.
2
Measure the voltage between fuse F17 (60 A) (EJB) and ground.

Does the meter display battery voltage?
Yes
GO to C5.
No
LOCATE AND RECTIFY the break in the voltage supply of fuse F17 (60 A) (EJB) with the aid of the wiring diagrams. CHECK system operates correctly
C5: CHECK THE VOLTAGE SUPPLY TO FUSE F18 (60 A) (EJB) FOR OPEN CIRCUIT
1
Ignition switch in position II.
2
Measure the voltage between fuse F18 (60 A) (EJB) and ground.

Does the meter display battery voltage?
Yes
GO to C6.
No
LOCATE AND RECTIFY the break in the voltage supply of fuse F18 (60 A) (EJB) with the aid of the wiring diagrams. CHECK system operates correctly
C6: CHECK THE VOLTAGE SUPPLY TO THE LIGHTS CONTROL MODULE FOR OPEN CIRCUIT
1
Ignition switch in position 0.
2
Disconnect Lights control module from connector C2LF23D.

3
Measure the voltage between the lights control module, connector C2LF23D, pin 1, circuit SBB33B (RD), wiring harness side and ground.
4
Ignition switch in position II.

Does the meter display battery voltage?
Yes
GO to C7.
No
LOCATE and RECTIFY the break in the circuits between fuse F33 (5 A) (EJB) and the lights control module with the aid of the wiring diagrams. CHECK system operates correctly
C7: CHECK THE GROUND CONNECTION TO THE SMART JUNCTION BOX FOR OPEN CIRCUIT
1
Ignition switch in position 0.
2
Disconnect Smart Junction Box from connector C1BP02B.
3
Measure the resistance between the Smart Junction Box, connector C1BP02B, pin 65:
  • LHD: circuit GD140J (BK/GN), wiring harness side and ground.
  • RHD: circuit GD134U (BK/VT), wiring harness side and ground.

Is a resistance of less than 2 Ohm registered?
Yes
GO to C8.
No
- LHD: LOCATE and RECTIFY the break in the circuits between the Smart Junction Box and ground connection G3D138 with the aid of the Wiring Diagrams. CHECK system operates correctly
- RHD: LOCATE and RECTIFY the break in the circuits between the Smart Junction Box and ground connection G3D133 with the aid of the Wiring Diagrams. CHECK system operates correctly
C8: CHECK THE LIN DATA BUS CONNECTION BETWEEN THE LIGHTS CONTROL MODULE AND THE SMART JUNCTION BOX FOR SHORT CIRCUIT TO BATTERY VOLTAGE
1
Disconnect Smart Junction Box from connector C1BP02C.
2
Disconnect Lights control module from connector C2LF23D.
3
Ignition switch in position II.

4
Measure the voltage between the lights control module, connector C2LF23D, pin 6, circuit VLF25A (GN/VT), wiring harness side and ground.

Does the meter display battery voltage?
Yes
LOCATE and RECTIFY the short to battery voltage in the circuits between the lights control module and the Smart Junction Box with the aid of the wiring diagrams. CHECK system operates correctly
No
GO to C9.
C9: CHECK THE LIN DATA BUS CONNECTION BETWEEN THE LIGHTS CONTROL MODULE AND THE SMART JUNCTION BOX FOR SHORT CIRCUIT TO GROUND
1
Ignition switch in position 0.

2
Measure the resistance between the lights control module, connector C2LF23D, pin 6, circuit VLF25A (GN/VT), wiring harness side and ground.

Is a resistance of more than 10,000 Ohm measured?
Yes
INSTALL A NEW lights control module. CHECK system operates correctly
No
LOCATE and RECTIFY the short to ground in the circuits between the lights control module and the Smart Junction Box with the aid of the wiring diagrams. CHECK system operates correctly
C10: CHECK THE CIRCUIT BETWEEN THE SMART JUNCTION BOX AND THE FRONT FOG LAMP UNIT FOR SHORT TO BATTERY VOLTAGE
1
Ignition switch in position 0.
2
Disconnect Smart Junction Box from connector C1BP02A.
3
Ignition switch in position II.
4
CHECK the parking lamps.

Is one of the front parking lamps permanently lit?
Yes
- Left-hand parking lamp permanently lit: Use the Wiring Diagrams to LOCATE and RECTIFY the short to battery voltage in circuits connected to the Smart Junction Box, connector C1BP02A, pin 39. CHECK system operates correctly
- Right-hand parking lamp permanently lit: Use the Wiring Diagrams to LOCATE and RECTIFY the short to battery voltage in circuits connected to the Smart Junction Box, connector C1BP02A, pin 40. CHECK system operates correctly
No
CHECK the Smart Junction Box and INSTALL A NEW ONE if required. CHECK system operates correctly
C11: CHECK THE CIRCUIT BETWEEN THE SMART JUNCTION BOX AND THE REAR PARKING LAMPS FOR SHORT TO BATTERY VOLTAGE
1
Ignition switch in position 0.
2
Disconnect Smart Junction Box from connector C1BP02B.
3
Ignition switch in position II.
4
CHECK the parking lamps.

Are the rear parking lamps permanently lit on one side?
Yes
- Left-hand rear parking lamp permanently lit: Use the Wiring Diagrams to LOCATE and RECTIFY the short to battery voltage in circuits connected to the Smart Junction Box, connector C1BP02B, pin 50. CHECK system operates correctly
- Right-hand rear parking lamp permanently lit: Use the Wiring Diagrams to LOCATE and RECTIFY the short to battery voltage in circuits connected to the Smart Junction Box, connector C1BP02B, pin 51. CHECK system operates correctly
No
CHECK the Smart Junction Box and INSTALL A NEW ONE if required. CHECK system operates correctly If the concern persists:
REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).
C12: CHECK THE CIRCUITS BETWEEN THE SMART JUNCTION BOX AND THE LICENSE PLATE LAMPS FOR SHORT TO BATTERY VOLTAGE
1
Ignition switch in position 0.
2
Disconnect Smart Junction Box from connector C1BP02B.
3
Ignition switch in position II.
4
CHECK the license plate lamps.

Do the license plate lamps illuminate continuously?
Yes
Use the Wiring Diagrams to LOCATE and RECTIFY the short to battery voltage in circuits connected to the Smart Junction Box, connector C1BP02B, pin 52. CHECK system operates correctly
No
CHECK the Smart Junction Box and INSTALL A NEW ONE if required. CHECK system operates correctly If the concern persists:
REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).

Trailer Lamps > < Headlamp Leveling