1998 NISSAN PICK-UP low beam

ELECTRICAL SYSTEM
SECTION
EL
When you read wiring diagrams:
lRead GI section, ``HOW TO READ WIRING DIAGRAMS''.
When you perform trouble diagnoses, read GI section, ``HOW TO FOLLOW FLOW CHART IN
TROUBLE DIAGNOSES'' and ``HOW TO PERFORM EFFICIENT DIAGNOSIS FOR AN ELECTRI-
CAL INCIDENT''.
CONTENTS
PRECAUTIONS......................................................... 1
Supplemental Restraint System (SRS) ``AIR
BAG'' (4WD models).............................................. 1
Supplemental Restraint System (SRS) ``AIR
BAG'' (2WD models).............................................. 1
HARNESS CONNECTOR.......................................... 2
Description ............................................................. 2
STANDARDIZED RELAY.......................................... 3
Description ............................................................. 3
POWER SUPPLY ROUTING..................................... 5
Schematic .............................................................. 5
Wiring Diagram - POWER -................................... 6
Fuse ..................................................................... 13
Fusible Link .......................................................... 13
Circuit Breaker Inspection.................................... 13
GROUND DISTRIBUTION....................................... 14
BATTERY................................................................. 18
How to Handle Battery......................................... 18
Battery Test and Charging Chart......................... 21
Service Data and Specifications (SDS) ............... 25
STARTING SYSTEM............................................... 26
Wiring Diagram - START - .................................. 26
Trouble Diagnoses ............................................... 27
Construction ......................................................... 28
Removal and Installation ..................................... 30
Inspection ............................................................. 30
Assembly.............................................................. 32
Service Data and Specifications (SDS) ............... 33
CHARGING SYSTEM.............................................. 34
Wiring Diagram - CHARGE -/Gasoline Engine ... 34
Wiring Diagram - CHARGE -/Diesel Engine ....... 35Trouble Diagnoses ............................................... 36
Construction ......................................................... 38
Removal and Installation ..................................... 39
Disassembly ......................................................... 39
Inspection ............................................................. 39
Assembly.............................................................. 40
Service Data and Specifications (SDS) ............... 41
COMBINATION SWITCH........................................ 42
Check ................................................................... 42
Replacement ........................................................ 43
HEADLAMP - Conventional Type -....................... 44
Wiring Diagram - H/LAMP -/LHD Models ............ 44
Wiring Diagram - H/LAMP -/RHD Models ........... 46
Trouble Diagnoses ............................................... 48
Bulb Replacement................................................ 49
Aiming Adjustment ............................................... 49
Low Beam ............................................................ 50
HEADLAMP - Daytime Light System -................. 51
System Description .............................................. 51
Schematic ............................................................ 53
Wiring Diagram - DTRL - ..................................... 54
Trouble Diagnoses ............................................... 57
Bulb Replacement................................................ 57
Aiming Adjustment ............................................... 57
HEADLAMP - Dim-dip Lamp System -................. 58
System Description .............................................. 58
Schematic ............................................................ 58
Wiring Diagram - DIMDIP -.................................. 59
Trouble Diagnoses ............................................... 62
Bulb Replacement................................................ 62
Aiming Adjustment ............................................... 62
EL

EARTH CONNECT TO CONN. NO. CELL CODE
M1/M54 COMBINATION METER (AIR BAG WARNING
LAMP)N5 RS-SRS EL-WARN
COMBINATION METER (CLOCK ILLUMINA-
TION)N6 EL-ILL EL-CLOCK
COMBINATION METER (DIGITAL CLOCK) N6 EL-CLOCK
COMBINATION METER (FUEL GAUGE) N5 EL-METER
COMBINATION METER (HIGH BEAM INDICA-
TOR)N5 EL-H/LAMP EL-DTRL EL-DIMDIP
COMBINATION METER (METER ILLUMINA-
TION)N6 EL-ILL
COMBINATION METER (ODO/TRIP METER
ILLUMINATION)N6 EL-ILL
COMBINATION METER (REAR FOG LAMP
INDICATOR)N6 EL-R/FOG
COMBINATION METER (TURN LH INDICA-
TOR)N6 EL-TURN
COMBINATION METER (TURN RH INDICA-
TOR)N6 EL-TURN
COMBINATION METER (UNIFIED METER
CONTROL UNIT)N5 EC-VSS EC-GLOW EL-METER
COMBINATION METER (WATER TEMP.
GAUGE)N5 EL-METER
DOOR MIRROR REMOTE CONTROL SWITCH N3 EL-MIRROR
FRONT WIPER AMPLIFIER (RHD models with
KA engine)F20 EL-WIPER
FRONT WIPER MOTOR (RHD models with KA
engine)F21 EL-WIPER
HEADLAMP AIMING SWITCH N7 EL-H/AIM
INTERIOR LAMP (Single cab and King cab) R4 EL-INT/L
SPOT LAMP R3 EL-INT/L
FUEL TANK GAUGE UNIT (With electric fuel
pump)C3EC-FPCM EC-F/PUMP EL-METER
EL-WARN
FUEL TANK GAUGE UNIT (With mechanical
fuel pump)C4 EL-METER EL-WARN
LICENSE PLATE LAMP LH (With step bumper) T7 EL-TAIL/L
LICENSE PLATE LAMP LH (Without step
bumper)T6 EL-TAIL/L
LICENSE PLATE LAMP RH (With step bumper) T3 EL-TAIL/L
LICENSE PLATE LAMP RH (Without step
bumper)T5 EL-TAIL/L
REAR COMBINATION LAMP LH (BACK-UP)
(A-chassis models, and except for Europe,
Australia and China)T8 EL-BACK/L
REAR COMBINATION LAMP LH (BACK-UP)
(For Europe, Australia and China except
A-chassis models)T9 EL-BACK/L
REAR COMBINATION LAMP LH (REAR FOG)
(LHD models except A-chassis)T9 EL-R/FOG
REAR COMBINATION LAMP LH (TAIL AND
STOP) (A-chassis models, and except for
Europe, Australia and China)T8 EL-TAIL/L EL-STOP/L
REAR COMBINATION LAMP LH (TAIL AND
STOP) (For Europe, Australia and China except
A-chassis models)T9 EL-TAIL/L EL-STOP/L
REAR COMBINATION LAMP LH (TURN SIG-
NAL) (A-chassis models, and except for
Europe, Australia and China)T8 EL-TURN
REAR COMBINATION LAMP LH (TURN SIG-
NAL) (For Europe, Australia and China except
A-chassis models)T9 EL-TURN
REAR COMBINATION LAMP RH (BACK-UP)
(A-chassis models, and except for Europe, Aus-
tralia and China)T1 EL-BACK/L
REAR COMBINATION LAMP RH (BACK-UP)
(For Europe, Australia and China except
A-chassis models)T2 EL-BACK/L
GROUND DISTRIBUTION
EL-15

Trouble Diagnoses
Symptom Possible cause Repair order
LH headlamps do not operate. 1. Bulb
2. Grounds
E6andE39
3. 15A fuse
4. Lighting switch1. Check bulb.
2. Check grounds
E6andE39.
3. Check 15A fuse (No.
32, located in fusible link and
fuse box). Verify battery positive voltage is present
at terminal
V8of lighting switch.
4. Check lighting switch.
RH headlamps do not operate. 1. Bulb
2. Grounds
E6andE39
3. 15A fuse
4. Lighting switch1. Check bulb.
2. Check grounds
E6andE39.
3. Check 15A fuse (No.
31, located in fusible link and
fuse box). Verify battery positive voltage is present
at terminal
V5of lighting switch.
4. Check lighting switch.
LH high beams do not operate, but
LH low beam operates.1. Bulbs
2. Open in LH high beams circuit
3. Lighting switch1. Check bulbs.
2. Check R/L wire between lighting switch and LH head-
lamps for an open circuit.
3. Check lighting switch.
LH low beam does not operate, but
LH high beam operates.1. Bulb
2. Open in LH low beam circuit
3. Lighting switch1. Check bulb.
2. Check R/G wire between lighting switch and LH head-
lamp for an open circuit.
3. Check lighting switch.
RH high beams do not operate, but
RH low beam operates.1. Bulbs
2. Open in RH high beams circuit
3. Lighting switch1. Check bulbs.
2. Check R/Y wire between lighting switch and RH head-
lamps for an open circuit.
3. Check lighting switch.
RH low beam does not operate, but
RH high beam operates.1. Bulb
2. Open in RH low beam circuit
3. Lighting switch1. Check bulb.
2. Check R/B wire between lighting switch and RH head-
lamp for an open circuit.
3. Check lighting switch.
High beam indicator does not work. 1. Bulb
2. Grounds
M1andM54
3. Open in high beam circuit1. Check bulb in combination meter.
2. Check grounds
M1andM54.
3. Check R/L wire between lighting switch and combina-
tion meter for an open circuit.
HEADLAMP Ð Conventional Type Ð
EL-48

Bulb Replacement
The headlamp is a semi-sealed beam type which uses a replace-
able halogen bulb. The bulb can be replaced from the engine
compartment side without removing the headlamp body.
lGrasp only the plastic base when handling the bulb.
Never touch the glass envelope.
1. Disconnect the battery cable.
2. Disconnect the harness connector from the back side of the
bulb.
3. Pull off the rubber cap.
4. Push and raise retaining pin to loosen it.
5. Remove the headlamp bulb carefully. Do not shake or rotate
the bulb when removing it.
6. Install in the reverse order of removal.
CAUTION:
Do not leave headlamp reflector without bulb for a long
period of time. Dust, moisture, smoke, etc. entering head-
lamp body may affect the performance of the headlamp.
Remove headlamp bulb from the headlamp reflector just
before a replacement bulb is installed.
Aiming Adjustment
When performing headlamp aiming adjustment, use an aiming
machine, aiming wall screen or headlamp tester. Aimers should
be in good repair, calibrated and operated in accordance with
respective operation manuals.
If any aimer is not available, aiming adjustment can be done as
follows:
For details, refer to the regulations in your own country.
a. Keep all tires inflated to correct pressures.
b. Place vehicle and tester on one and same flat surface.
c. See that there is no-load in vehicle (coolant, engine oil
filled up to correct level and full fuel tank) other than the
driver (or equivalent weight placed in driver's position).
CAUTION:
Be sure aiming switch is set to ``0'' when performing aiming
adjustment on vehicles equipped with headlamp aiming
control.
GEL187
SEL226P
HEADLAMP Ð Conventional Type Ð
EL-49

Low Beam
1. Turn headlamp low beam on.
2. Use adjusting screws to perform aiming adjustment.
lFirst tighten the adjusting screw all the way and then
make adjustment by loosening the screw.
lAdjust headlamps so that main axis of light is parallel to
center line of body and is aligned with point P shown in
illustration.
lFigure to the left shows headlamp aiming pattern for
driving on right side of road; for driving on left side of
road, aiming pattern is reversed.
lDotted lines in illustration show center of headlamp.
``H'': Horizontal center line of headlamps
``W
L'': Distance between each headlamp center
``L'': 5,000 mm (196.85 in)
``C'': 65 mm (2.56 in)
GEL188
SEL254I
HEADLAMP Ð Conventional Type Ð
EL-50

System Description
OPERATION
Headlamp system on vehicles for North Europe contains a daytime light system. The unit operates to illu-
minate headlamps low beam, parking, tail, license lamps and illuminations automatically in the following
conditions.
lThe engine is running with lighting switch in OFF position.
When the any of following conditions exists, the daytime light operation will be canceled.
lIgnition switch is in any position other than ON
lEngine is stopped
lLighting switch is turned to 1st or 2nd position.
If the daytime light system is canceled, lighting switch operations are the same as for conventional light sys-
tem.
DAYTIME LIGHT IS OPERATING
(With engine running and lighting switch in OFF position)
With engine running, power is supplied
lfrom alternator terminal L
lthrough daytime light control unit terminalV8
lto base of transistor-2 in the daytime light control unit.
The transistor-2 supplies ground path to all relays. Then the relays energize to illuminate lamps.
SEL667V
HEADLAMP Ð Daytime Light System Ð
EL-51

System Description
Headlamp system on RHD vehicles for Europe contains a dim-dip lamp system. The unit operates both
headlamp low beams at half illumination in the following conditions.
lLighting switch is turned to 1st, with ignition switch in ON position. In other conditions, the dim-dip lamp
is canceled and lighting switch operations are the same as in conventional light systems.
Schematic
HEL326A
HEADLAMP Ð Dim-dip Lamp System Ð
EL-58

Trouble Diagnoses
DIM-DIP LAMP CONTROL UNIT INSPECTION TABLE
Terminal No. ConnectionsINPUT (I)/
OUTPUT (O)Operated conditionVoltage (V)
(Approximate
values)
1Lighting switch
(Low beam)I Lighting switchLow beam ON 12
Other 0
2Lighting switch
(High beam)I Lighting switchHigh beam ON 12
Other 0
3 Power source Ð Ð 12
4 Lighting switch I1STz2ND position 12
OFF 0
5 Ignition on signal I Ignition switchON or START 12
ACC or OFF 0
6Power source for head-
lamp LHÐÐ12
7 Headlamp LH O Lighting switchLow beam ON 12
OtherDim-dip lamp
operating12
Dim-dip lamp
off0
8 LH headlamp ground ÐON (dim-dip lamp operating*) 6
OFF 0
9 Headlamp RH O Lighting switchHigh beam ON 12
OtherDim-dip lamp
operating6
Dim-dip lamp
off0
10 Ground Ð Ð Ð
*: Dim-dip lamp operating: Lighting switch in ``1st.'' position with ignition switch ON.
Bulb Replacement
Refer to ``HEADLAMP'' (EL-49).
Aiming Adjustment
Refer to ``HEADLAMP'' (EL-49).
HEADLAMP Ð Dim-dip Lamp System Ð
EL-62