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K ELECTRICAL

SECTION
LIGHTING SYSTEM
LT B

E
CONTENTS
PRECAUTIONS ......................................................... 4 . Bulb Replacement ................................................. 30 . F
Precautions for Supplemental Restraint System HEADLAMP (OUTER SIDE), FOR LOW BEAM... 30
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- HEADLAMP (INNER SIDE), FOR HIGH BEAM... 30
SIONER" ................................................................. 4
. FRONT TURN SIGNAL/PARKING LAMP .......... 30 . G
General precautions for service operations ............ 4 . FRONT SIDE MARKER LAMP .......................... 30 .
Wiring Diagrams and Trouble Diagnosis ................. 4 . Removal and Installation ....................................... 31 .
HEADLAMP (FOR USA) ........................................... 5 . REMOVAL .......................................................... 31.
H
Component Parts and Harness Connector Location 5 ..... INSTALLATION .................................................. 31 .
System Description ................................................. 5 . Disassembly and Assembly ................................... 31 .
OUTLINE .............................................................. 5
. DISASSEMBLY .................................................. 31 .
BATTERY SAVER CONTROL ............................. 6 . HEADLAMP (FOR CANADA) - DAYTIME LIGHT I
AUTO LIGHT OPERATION .................................. 7 . SYSTEM - ................................................................. 32
.
VEHICLE SECURITY SYSTEM (PANIC ALARM) 7 ..... Component Parts and Harness Connector Location 32 ...
CAN Communication System Description ............... 7 . System Description ................................................ 33 . J
Schematic ............................................................... 8
. OUTLINE ............................................................ 33
.
Wiring Diagram -- H/LAMP -- ................................ 9 . DAYTIME LIGHT OPERATION .......................... 33 .
Terminals and Reference Values for BCM ............ 13 . COMBINATION SWITCH READING FUNCTION 33 ...
LT
Terminals and Reference Values for IPDM E/R .... 14 . AUTO LIGHT OPERATION ................................ 33 .
How to Proceed With Trouble Diagnosis ............... 14 . CAN Communication System Description ............. 34 .
Preliminary Check ................................................. 15 . Schematic .............................................................. 35
.
CHECK POWER SUPPLY AND GROUND CIR- Wiring Diagram -- DTRL -- .................................. 36 . L
CUIT ................................................................... 15
. Terminals and Reference Values for BCM ............. 40 .
CONSULT-II Function (BCM) ................................ 17 . How to Proceed With Trouble Diagnosis ............... 41 .
CONSULT-II OPERATION ................................. 17 . Preliminary Check ................................................. 41 . M
WORK SUPPORT .............................................. 18 . CHECK BCM CONFIGURATION ....................... 41 .
DATA MONITOR ................................................ 18 . INSPECTION FOR POWER SUPPLY AND
ACTIVE TEST .................................................... 19 . GROUND CIRCUIT ............................................ 41 .
SELF-DIAGNOSTIC RESULTS ......................... 19 . INSPECTION PARKING BRAKE SWITCH CIR-
CONSULT-II Function (IPDM E/R) ........................ 20 . CUIT ................................................................... 42
.
CONSULT-II OPERATION ................................. 20 . CONSULT-II Functions .......................................... 43 .
DATA MONITOR ................................................ 21 . Daytime Light Control Does Not Operate Properly
ACTIVE TEST .................................................... 21 . (Normal Headlamps Operate Properly) ................. 43 .
Headlamp HI Does Not Illuminate (Both Sides) .... 22 . Aiming Adjustment ................................................. 45 .
Headlamp HI Does Not Illuminate (One Side) ...... 24 . Bulb Replacement ................................................. 45 .
High Beam Indicator Lamp Does Not Illuminate ... 25 Removal and Installation ....................................... 45 .
Headlamp LO Does Not Illuminate (Both Sides) ... 25 Disassembly and Assembly ................................... 45 .
Headlamp LO Does Not Illuminate (One Side) ..... 27 . AUTO LIGHT SYSTEM ............................................ 46 .
Headlamps Do Not Turn OFF ............................... 28 . Component Parts and Harness Connector Location 46 ...
Aiming Adjustment ................................................ 29 . System Description ................................................ 47 .
LOW BEAM AND HIGH BEAM .......................... 29 . OUTLINE ............................................................ 47
.

Revision: January 2005 LT-1 2004 Titan
COMBINATION SWITCH READING FUNCTION 47 ... TION ...................................................................76
.
EXTERIOR LAMP BATTERY SAVER CONTROL 47 ... COMBINATION SWITCH READING FUNCTION ...77
DELAY TIMER FUNCTION ................................ 47 . CAN Communication System Description .............77 .
CAN Communication System Description ............. 47 . Wiring Diagram -- TURN -- ..................................78 .
Major Components and Functions ......................... 47 . Terminals and Reference Values for BCM .............80 .
Schematic .............................................................. 48
. How to Proceed With Trouble Diagnosis ...............81 .
Wiring Diagram -- AUTO/L -- ............................... 49 . Preliminary Check ..................................................82 .
Terminals and Reference Values for BCM ............. 52 . CHECK POWER SUPPLY AND GROUND CIR-
Terminals and Reference Values for IPDM E/R ..... 53 . CUIT ....................................................................82
.
How to Proceed With Trouble Diagnosis ............... 54 . CONSULT-II Function (BCM) .................................83 .
Preliminary Check ................................................. 54 . CONSULT-II OPERATION ..................................83 .
CHECK BCM CONFIGURATION ....................... 54 . DATA MONITOR .................................................84 .
SETTING CHANGE FUNCTIONS ...................... 54 . ACTIVE TEST .....................................................84 .
CHECK POWER SUPPLY AND GROUND CIR- Turn Signal Lamp Does Not Operate .....................85 .
CUIT ................................................................... 54
. Rear Turn Signal Lamp Does Not Operate ............86 .
CONSULT-II Function (BCM) ................................. 56 . Hazard Warning Lamp Does Not Operate But Turn
CONSULT-II OPERATION .................................. 56 . Signal Lamps Operate ...........................................87 .
WORK SUPPORT .............................................. 57 . Turn Signal Indicator Lamp Does Not Operate ......88 .
DATA MONITOR ................................................. 57 . Bulb Replacement (Front Turn Signal Lamp) .........89 .
ACTIVE TEST .................................................... 58 . Bulb Replacement (Rear Turn Signal Lamp) .........89 .
SELF-DIAGNOSTIC RESULTS .......................... 58 . Removal and Installation of Front Turn Signal Lamp ...89
CONSULT-II Function (IPDM E/R) ......................... 59 . Removal and Installation of Rear Turn Signal Lamp...89
CONSULT-II OPERATION .................................. 59 . LIGHTING AND TURN SIGNAL SWITCH ...............90 .
DATA MONITOR ................................................. 60 . Removal and Installation ........................................90 .
ACTIVE TEST .................................................... 60 . REMOVAL ...........................................................90 .
Trouble Diagnosis Chart by Symptom ................... 61 . INSTALLATION ...................................................90 .
Lighting Switch Inspection ..................................... 61 . HAZARD SWITCH ....................................................91 .
Optical Sensor System Inspection ......................... 62 . Removal and Installation ........................................91 .
Removal and Installation of Optical Sensor ........... 63 . REMOVAL ...........................................................91 .
REMOVAL .......................................................... 63. INSTALLATION ...................................................91 .
INSTALLATION ................................................... 63 . COMBINATION SWITCH .........................................92 .
FRONT FOG LAMP ................................................. 64 . Wiring Diagram -- COMBSW -- ...........................92 .
Component Parts and Harness Connector Location 64 ... Combination Switch Reading Function ..................93 .
System Description ................................................ 64 . CONSULT-II Function (BCM) .................................93 .
OUTLINE ............................................................ 64
. CONSULT-II OPERATION ..................................93 .
COMBINATION SWITCH READING FUNCTION 65 ... DATA MONITOR .................................................94 .
EXTERIOR LAMP BATTERY SAVER CONTROL 65 ... Combination Switch Inspection ..............................95 .
CAN Communication System Description ............. 65 . Removal and Installation ........................................97 .
Wiring Diagram -- F/FOG -- ................................. 66 . Switch Circuit Inspection ........................................97 .
Terminals and Reference Values for BCM ............. 68 . STOP LAMP .............................................................98 .
Terminals and Reference Values for IPDM E/R ..... 69 . System Description ................................................98 .
How to Proceed With Trouble Diagnosis ............... 69 . Wiring Diagram -- STOP/L -- ...............................99 .
Preliminary Check ................................................. 70 . High-Mounted Stop Lamp .................................... 101 .
CHECK BCM CONFIGURATION ....................... 70 . BULB REPLACEMENT ..................................... 101 .
CHECK POWER SUPPLY AND GROUND CIR- REMOVAL AND INSTALLATION ...................... 101 .
CUIT ................................................................... 70
. Stop Lamp ............................................................ 101
.
CONSULT-II Functions .......................................... 71 . BULB REPLACEMENT ..................................... 101 .
Front Fog Lamps Do Not Illuminate (Both Sides) ... 71 REMOVAL AND INSTALLATION ...................... 101 .
Front Fog Lamp Does Not Illuminate (One Side) ... 72 BACK-UP LAMP .................................................... 102 .
Aiming Adjustment ................................................. 73 . Wiring Diagram -- BACK/L -- ............................. 102 .
Bulb Replacement ................................................. 74 . Bulb Replacement ................................................ 103 .
Removal and Installation ....................................... 74 . Removal and Installation ...................................... 103 .
TURN SIGNAL AND HAZARD WARNING LAMPS... 75 PARKING, LICENSE PLATE AND TAIL LAMPS ... 104 .
Component Parts and Harness Connector Location 75 ... Component Parts and Harness Connector Location .104
System Description ................................................ 75 . System Description .............................................. 104 .
OUTLINE ............................................................ 75
. OPERATION BY LIGHTING SWITCH .............. 105 .
TURN SIGNAL OPERATION .............................. 75 . COMBINATION SWITCH READING FUNCTION .105
HAZARD LAMP OPERATION ............................ 76 . EXTERIOR LAMP BATTERY SAVER CONTROL .105
REMOTE KEYLESS ENTRY SYSTEM OPERA- CAN Communication System Description ........... 105 .

Revision: January 2005 LT-2 2004 Titan
Schematic ........................................................... 106 . ROOM LAMP TIMER OPERATION ................. 129 .
Wiring Diagram -- TAIL/L -- ............................... 107 . INTERIOR LAMP BATTERY SAVER CONTROL 129 . A
Terminals and Reference Values for BCM ...........110 . Schematic ............................................................ 131
.
Terminals and Reference Values for IPDM E/R ... 111 . Wiring Diagram -- INT/L -- ................................. 134 .
How to Proceed With Trouble Diagnosis .............. 111 . Terminals and Reference Values for BCM ........... 142 . B
Preliminary Check ................................................112 . How to Proceed With Trouble Diagnosis ............. 143 .
CHECK POWER SUPPLY AND GROUND CIR- Preliminary Check ............................................... 143 .
CUIT ..................................................................112
. INSPECTION FOR POWER SUPPLY AND
CONSULT-II Functions .........................................113 . GROUND CIRCUIT .......................................... 143 . C
Parking, License Plate and/or Tail Lamps Do Not CONSULT-II Function (BCM) .............................. 144 .
Illuminate ..............................................................113. CONSULT-II OPERATION ................................ 144 .
Parking, License Plate and Tail Lamps Do Not Turn WORK SUPPORT ............................................ 145 . D
OFF (After Approx. 10 Minutes) ...........................116 . DATA MONITOR .............................................. 145 .
Front Parking Lamp ..............................................117 . ACTIVE TEST .................................................. 146 .
BULB REPLACEMENT .....................................117 . Front Room/Map Lamp Assembly Control Does Not E
Tail Lamp ..............................................................117 . Operate ................................................................ 146
.
BULB REPLACEMENT .....................................117 . Personal Lamp 2nd Row Control Does Not Operate
REAR COMBINATION LAMP ................................118 . (Room/Map Lamps Operate) ............................... 148 .
Bulb Replacement ................................................118 . All Step/Foot/Puddle Lamps Do Not Operate ...... 149 . F
Removal and Installation ......................................118 . All Interior Room Lamps Do Not Operate ............ 150 .
..........................................................................118
. ILLUMINATION ...................................................... 151 .
TRAILER TOW .......................................................119 . Component Parts and Harness Connector Location 151 . G
Component Parts and Harness Connector Location ..119 System Description .............................................. 151 .
System Description ..............................................119 . ILLUMINATION OPERATION BY LIGHTING
TRAILER TAIL LAMP OPERATION ................. 120 . SWITCH ........................................................... 152
. H
TRAILER TURN SIGNAL AND HAZARD LAMP EXTERIOR LAMP BATTERY SAVER CONTROL 153 .
OPERATION .................................................... 120 . CAN Communication System Description ........... 153 .
TRAILER STOP LAMP OPERATION ............... 120 . Schematic ............................................................ 154
.
I
TRAILER POWER SUPPLY OPERATION ....... 120 . Wiring Diagram -- ILL -- ..................................... 157 .
Schematic ........................................................... 122 . Removal and Installation ..................................... 166 .
Wiring Diagram -- T/TOW -- .............................. 123 . ILLUMINATION CONTROL SWITCH ............... 166 .
INTERIOR ROOM LAMP ....................................... 126 . BULB SPECIFICATIONS ....................................... 167 . J
Component Parts and Harness Connector Location 126 . Headlamp ............................................................ 167
.
System Description ............................................. 127 . Exterior Lamp ...................................................... 167
.
POWER SUPPLY AND GROUND ................... 127 . Interior Lamp/Illumination .................................... 167 . LT
SWITCH OPERATION ..................................... 128 .

Revision: January 2005 LT-3 2004 Titan
PRECAUTIONS

PRECAUTIONS PFP:00011

Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" EKS00F9U

The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT PRE-TENSIONER", used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SRS and SB section of this Service Man-
ual.
WARNING:
q To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance must be per-
formed by an authorized NISSAN/INFINITI dealer.
q Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS section.
q Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or
harness connectors.
General precautions for service operations EKS007TJ

q Never work with wet hands.
q Turn the lighting switch OFF before disconnecting and connecting the connector.
q When checking the headlamp on/off operation, check it on vehicle and with the power connected to the
vehicle-side connector.
q Do not touch the headlamp bulb glass surface with bare hands or allow oil or grease to get on it. Do not
touch the headlamp bulb just after the headlamp is turned off, because it is very hot.
q When the bulb has burned out, wrap it in a thick vinyl bag and discard. Do not break the bulb.
q Leaving the bulb removed from the headlamp housing for a long period of time can deteriorate the perfor-
mance of the lens and reflector (dirt, clouding). Always prepare a new bulb and have it on hand when
replacing the bulb.
q Do not use organic solvent (paint thinner or gasoline) to clean lamps and to remove old sealant.
Wiring Diagrams and Trouble Diagnosis EKS00733

When you read wiring diagrams, refer to the following:
q Refer to GI-14, "How to Read Wiring Diagrams" in GI section.
q Refer to PG-4, "POWER SUPPLY ROUTING CIRCUIT" for power distribution in PG section.
When you perform trouble diagnosis, refer to the following:
q Refer to GI-11, "HOW TO FOLLOW TEST GROUPS IN TROUBLE DIAGNOSES" in GI section.
q Refer to GI-27, "How to Perform Efficient Diagnosis for an Electrical Incident" in GI section.

Revision: January 2005 LT-4 2004 Titan
HEADLAMP (FOR USA)

HEADLAMP (FOR USA) PFP:26010
A
Component Parts and Harness Connector Location EKS00734

WKIA3579E

System Description EKS00735

Control of the headlamp system operation is dependent upon the position of the combination switch (lighting
switch). When the lighting switch is placed in the 2ND position, the BCM (body control module) receives input
requesting the headlamps (and tail lamps) illuminate. This input is communicated to the IPDM E/R (intelligent
power distribution module engine room) across the CAN communication lines. The CPU (central processing
unit) of the IPDM E/R controls the headlamp high and headlamp low relay coils. When energized, these relays
direct power to the respective headlamps, which then illuminate.
OUTLINE
Power is supplied at all times
q to ignition relay, located in the IPDM E/R, and

Revision: January 2005 LT-5 2004 Titan
HEADLAMP (FOR USA)

q to headlamp high relay, located in the IPDM E/R, and
q to headlamp low relay, located in the IPDM E/R, and
q through 20A fuse (No. 53, located in the IPDM E/R)
q to CPU of the IPDM E/R, and
q through 50A fusible link (letter f , located in the fuse and fusible link box)
q to BCM terminal 70.
With the ignition switch in the ON or START position, power is supplied
q to ignition relay, located in the IPDM E/R, and
q through 10A fuse (No. 59, located in the fuse and relay box)
q to BCM terminal 38.
Ground is supplied
q to BCM terminal 67
q through grounds M57, M61 and M79, and
q to IPDM E/R terminals 38 and 59
q through grounds E9, E15 and E24.
Low Beam Operation
With the lighting switch in 2ND position, the BCM receives input requesting the headlamps to illuminate. This
input is communicated to the IPDM E/R across the CAN communication lines. The CPU of the IPDM E/R con-
trols the headlamp low relay coil. When energized, this relay directs power
q through 15A fuse (No. 41, located in the IPDM E/R)
q through IPDM E/R terminal 54
q to front combination lamp RH terminal 1, and
q through 15A fuse (No. 40, located in the IPDM E/R)
q through IPDM E/R terminal 52
q to front combination lamp LH terminal 1.
Ground is supplied
q to front combination lamp LH and RH terminal 4
q through grounds E9, E15 and E24.
With power and ground supplied, low beam headlamps illuminate.
High Beam Operation/Flash-to-Pass Operation
With the lighting switch in 2ND position and placed in HIGH or PASS position, the BCM receives input request-
ing the headlamp high beams to illuminate. This input is communicated to the IPDM E/R across the CAN com-
munication lines. The CPU of the combination meter controls the ON/OFF status of the HIGH BEAM indicator.
The CPU of the IPDM E/R controls the headlamp high relay coil. When energized, this relay directs power
q through 10A fuse (No. 34, located in the IPDM E/R)
q through IPDM E/R terminal 56
q to front combination lamp RH terminal 2, and
q through 10A fuse (No. 35, located in the IPDM E/R)
q through IPDM E/R terminal 55
q to front combination lamp LH terminal 2.
Ground is supplied
q to front combination lamp LH and RH terminal 3
q through grounds E9, E15 and E24.
With power and ground supplied, the high beam headlamps illuminate.
BATTERY SAVER CONTROL
When the combination switch (lighting switch) is in the 2ND position (ON), and the ignition switch is turned
from ON or ACC to OFF, the battery saver control feature is activated.
Under this condition, the headlamps remain illuminated for 5 minutes, unless the combination switch (lighting
switch) position is changed. If the combination switch (lighting switch) position is changed, then the headlamps
are turned off.

Revision: January 2005 LT-6 2004 Titan
HEADLAMP (FOR USA)

AUTO LIGHT OPERATION
Refer to LT-47, "System Description" for auto light operation. A

VEHICLE SECURITY SYSTEM (PANIC ALARM)
The vehicle security system (panic alarm) will flash the high beams if the system is triggered. Refer to BL-56, B
"Panic Alarm Operation" .
CAN Communication System Description EKS00736

Refer to LAN-8, "CAN COMMUNICATION" . C

Revision: January 2005 LT-7 2004 Titan
HEADLAMP (FOR USA)

Schematic EKS00737

WKWA0721E

Revision: January 2005 LT-8 2004 Titan
HEADLAMP (FOR USA)

Wiring Diagram -- H/LAMP -- EKS00738

WKWA1154E

Revision: January 2005 LT-9 2004 Titan
HEADLAMP (FOR USA)

WKWA1193E

Revision: January 2005 LT-10 2004 Titan
HEADLAMP (FOR USA)

WKWA1475E

Revision: January 2005 LT-11 2004 Titan
HEADLAMP (FOR USA)

WKWA0725E

Revision: January 2005 LT-12 2004 Titan
HEADLAMP (FOR USA)

Terminals and Reference Values for BCM EKS00739

A
Measuring condition
Terminal Wire Reference value
Signal name Ignition
No. color Operation or condition (Approx.)
switch B

C
Lighting, turn, wiper OFF
2 SB Combination switch input 5 ON
Wiper dial position 4

D
SKIA5291E

E
Lighting, turn, wiper OFF
3 G/Y Combination switch input 4 ON
Wiper dial position 4
F
SKIA5292E

Lighting, turn, wiper OFF
4 Y Combination switch input 3 ON
Wiper dial position 4
H

SKIA5291E

5 G/B Combination switch input 2 I

Lighting, turn, wiper OFF
ON J
6 V Combination switch input 1 Wiper dial position 4

SKIA5292E
LT

Lighting, turn, wiper OFF L
32 R/G Combination switch output 5 ON
Wiper dial position 4

SKIA5291E
M

Lighting, turn, wiper OFF
33 R/Y Combination switch output 4 ON
Wiper dial position 4

SKIA5292E

Lighting, turn, wiper OFF
34 L Combination switch output 3 ON
Wiper dial position 4

SKIA5291E

Revision: January 2005 LT-13 2004 Titan
HEADLAMP (FOR USA)

Measuring condition
Terminal Wire Reference value
Signal name Ignition
No. color Operation or condition (Approx.)
switch
35 O/B Combination switch output 2

Lighting, turn, wiper OFF
ON
36 R/W Combination switch output 1 Wiper dial position 4

SKIA5292E

38 W/L Ignition switch (ON) ON -- Battery voltage
39 W CAN-H -- -- --
40 R CAN-L -- -- --
67 B Ground ON -- 0V
70 W/B Battery power supply (fusible link) OFF -- Battery voltage

Terminals and Reference Values for IPDM E/R EKS0073A

Measuring condition
Terminal Wire Reference value
Signal name Ignition
No. color Operation or condition (Approx.)
switch
38 B Ground ON -- 0V
39 W CAN-H -- -- --
40 R CAN-L -- -- --

Lighting switch OFF 0V
52 L Headlamp low (LH) ON
2ND position ON Battery voltage

Lighting switch OFF 0V
54 R/Y Headlamp low (RH) ON
2ND position ON Battery voltage
Lighting switch OFF 0V
55 G Headlamp high (LH) ON HIGH or PASS
position ON Battery voltage

Lighting switch OFF 0V
56 L/W Headlamp high (RH) ON HIGH or PASS
position ON Battery voltage

59 B Ground ON -- 0V

How to Proceed With Trouble Diagnosis EKS0073B

1. Confirm the symptom or customer complaint.
2. Understand operation description and function description. Refer to LT-5, "System Description" .
3. Perform the Preliminary Check. Refer to LT-15, "Preliminary Check" .
4. Check symptom and repair or replace the cause of malfunction.
5. Does the headlamp operate normally? If YES: GO TO 6. If NO: GO TO 4.
6. Inspection End.

Revision: January 2005 LT-14 2004 Titan
HEADLAMP (FOR USA)

Preliminary Check EKS0073C

CHECK POWER SUPPLY AND GROUND CIRCUIT A

1. CHECK FUSES OR FUSIBLE LINK
Check for blown fuses or fusible link. B
Unit Power source Fuse No.
Battery f
BCM C
Ignition switch ON or START position 59
34
35 D
IPDM E/R Battery 40
41
E
53

Refer to LT-9, "Wiring Diagram -- H/LAMP --" .
OK or NG F
OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate cause of blown fuse before installing new fuse. Refer to PG-
4, "POWER SUPPLY ROUTING CIRCUIT" . G

2. CHECK POWER SUPPLY CIRCUIT
H
1. Disconnect BCM connectors.
2. Check voltage between BCM harness connector and ground.

Terminals Ignition switch position I
(+)
Terminal (

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