Isuzu N-Series. Manual — part 1116
8-176 CAB AND CHASSIS ELECTRICAL
Installation
To install, follow the removal steps in the reverse order.
Headlight Leveling Actuator
Inspection
This actuator has a mechanism that the angle of head
light leveling varies according to input voltage of SIG-
NAL.
1. Make sure that the voltage specified in table is out-
put to vehicle harness connector which will be con-
nected to actuator.
If the power supply is not 12 V, the SIGNAL output
varies in proportion to its voltage.
2. Connect the connector of actuator and vehicle har-
ness connector.
Make sure that the reflector of headlight moves to
the position indicated by HEAD LAMP LEVELING
SW.
Caution:
1. For vehicles with 12 V and 24 V, this leveling input
voltage is 12 V.
2. Input to SIGNAL must be less than 65% of the in-
put voltage to positive terminal.
N8A5175E
B-152 B-155
Actuator side
3
1
2
N8A0154E
1
2
3
SIGNAL
−
+
Input signal
voltage ratio
for SIGNAL
when the volt-
age difference
between posi-
tive and nega-
tive is
specified as
100%
−
+
HEAD
LAMP
POSITION
Position
0
10.0% (1.2 V)
0 V
12 V
Position
1
23.4% (2.8 V)
0 V
12 V
Position
2
36.7% (4.4 V)
0 V
12 V
Position
3
50.0% (6.0 V)
0 V
12 V
Position
4
63.4% (7.6 V)
0 V
12 V
CAB AND CHASSIS ELECTRICAL 8-177
Clearance Light, Taillight, License Plate Light and Illumination Light
General Description
The circuit consists of the lighting switch, clearance light, taillight, license plate light and the illumination light for each
of switch, meter and ashtray.
All these lights come on when the lighting switch is turned on with the switch to either clearance or headlight position.
Lighting Circuit
N8A0156E
8-178 CAB AND CHASSIS ELECTRICAL
Parts Location
R2, R-3
LICENSE
PLA
TE
LIGHT(LH)
R-14, R-15 LICENSE
PLA
TE LIGHT(RH)
B-52
F-25 FUSE
FL-1 FUSIBLE LINK
X-22 MARKER LIGHT
RELA
Y
N8A5179E
CAB AND CHASSIS ELECTRICAL 8-179
Circuit Diagram
For 12 Volt
H
T
LO
OFF
PASS
HIGH
E
Hu
PASS
B-17
B-43
B-52
B-46
H-6
X-4
B-28
B-86
B-87
B-33
H-16
H-16
J-24
J-25
X-22
H-16
R-1
R-2
R-3
H-5
B-70
H-5
J-66
J-63
J-65
J-62
J-64
J-67
B-7
B-1
B-30
B-30
J-9
B-153
B-153
B-74
R-6
B-5
P-1
P-2
P-3
P-4
P-5
B-70
B-70
B-70
B-70
1
8
7
10
4
3
2
X-4
X-4
X-4
21
45
5
J-65
J-62
1
6
1
6
1
1
1
1
X-22
X-22
X-22
32
51
4
5
1
4
11
1
66
B-74
B-74
B-5
B-5
4
1
4
33
1
7
R-1
R-6
B-46
B-52
B-28
B-33
1
2
1
2
10
9
5
10
B-43
2
1
B-87
B-86
5
2
1
3
5
4
8
7
FRAME-LH (FRONT)
FRAME-LH (CENTER)
HEADLIGHT
BRACKET (LH)
FRAME
FL-1 100A
MAIN
RELAY; HEADLIGHT (4)
LIGHTING SWITCH
COMBINATION SWITCH
0.5R
3W/B
8W/B
3W/B
3W/B
0.3L/R
0.3R
F-7 10A
TAILLIGHT
2
0.85LG/W
RELAY; TAIL
DIODE
RELAY; DIMMER
0.3R/L
0.85LG/R
RELAY; MARKER LIGHT
0.5G/R
REAR COMBINATION LIGHT-RH (TAIL)
REAR COMBINATION LIGHT-LH (TAIL)
0.5LG/R
0.5LG/R
0.5B
0.5B
1.25B
1.25B
0.5G/R
0.5G/R
LICENSE PLATE LIGHT
LICENSE PLATE LIGHT-LH (TAIL)
CORNERING LIGHT SWITCH (9)
(COMBINATION SWITCH)
CORNERING LIGHT SWITCH (11)
(COMBINATION SWITCH)
CLEARANCE LIGHT (RH)
CLEARANCE LIGHT (LH)
0.5LG/R
0.5LG/R
0.85B
0.85B
0.5G/R
0.5G/R
0.5LG/R
1.25B
1.25B
0.5B
TAILLIGHT-RH (REAR COMBINATION LIGHT)
TAILLIGHT-LH
(REAR COMBINATION LIGHT)
MARKER LIGHT
0.85LG/B
0.5B
0.5LG/R
0.5LG/R
0.5LG/R
0.5LG/R
0.5LG/R
ASHTRAY
HEATER BEZEL
RADIO
ILLUMINATION LIGHT (METER)
CIGAR LIGHTER
FOG LIGHT SWITCH
DOME LIGHT SWITCH
REAR FOG LIGHT SWITCH
ROOF MARKER LIGHT (LH)
HAZARD WARNING SWITCH
ROOF MARKER LIGHT (RH)
NPR / NQR (EC / AUSTRALIA)
0.5LG/R
0.5LG/R
0.5LG/R
0.5LG/R
0.5R/G
0.5R/G
0.5B
0.5B
0.3B
0.3B
0.5B
0.85B
0.3B
0.5B
0.5B
0.5B
0.5B
0.85B
3B
2B
1.25B
0.3G/O
1.25W
8W
LICENSE PLATE LIGHT(RH)
(NKR DUMP VEHICLE)
B-17
R-14
R-15
1
1
LICENSE PLATE LIGHT(LH)
3W
F-25 15A
MARKER LIGHT
0.85LG/R
0.85B
(0.5LG/R)
(0.5LG/R)
1.25B
(0.5LG/R)
(0.5G/R)
5
H-5
2L
4JH1
N8A5180E
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