GROUP 2 ELECTRICAL CIRCUIT

CLUSTER START KEY S/W 705

PARKING SEAT S.W REAR SUPPORT HARNESS
HEAD FRONT HEAD FRONT B BR R1 R2 C ACC 111
LAMP COMBI LH BRAKE OIL SWITCH
LAMP COMBI RH HT (OP)
OFF 112 REAR

WATER TEMP GAUGE

BEACON R/COMBI LH R/COMBI RH

ENG. OIL PRESSURE

WATER SEPARATOR
WORK

NO
ON 103

TURN SIGNAL LH
TURN SIGNAL RH
PARKING BRAKE
ST

COM

M
C
C

T
L T

E
E

BRAKE OIL LOW

EARTH(GAUGE)
ENGINE CHECK
GLOW LAMP(+)

CHARGE LAMP

ANTI-RESTART
W
W

GLOW LAMP(-)

ILLUMINATION
RELAY

B
B
HEAD LAMP

W
REARWORK S/W HAZARD SW

NC

T/M OIL TEMP

B
B

FUEL GAUGE

ST RW

ST RW
FUEL EMPTY
GLOW RELAY

BK LW

BK LW
TRAVER CUT ATTACH CUT

CL RB

CL RB
B GN

B GN
TN R

TN R
HEAD LAMP
CL-24
NEUTRAL

CL-25
ECU POWER

CL-4

SEAT BELT

AIR FILTER
CL-3

W
1 2 3 4 5 6 7 8 9 10 11 12
FUEL HEATER

R
CD-60

Y
OPS LAMP
AUX RELAY RELAY

L
1
2
FLASHER

2
8

8
7

7
10A

10A

20A

15A

10A

10A

10A

15A

10A

20A

9
5A

5A
COM
NO

NC

EARTH

CL-15

CL-16
UNIT

3
4
5
6

3
4
5
6
2

2
F/R SOL, GLOW RY

CL-23
(000)
(133)

(106)
(112)

ILLUM/HEAD LAMP

ALT,FUEL HEATER

AIR-CONDITIONER
(000)

(133)
(000)

(106)
(112)
(000)

TURN/STOP LAMP

CL-7
WORK LAMP,OPT
IG

2
6

6
ECU POWER RY.

3
1

1
000
187

Br
W

-
B

ECU,CLUSTER

G
START RELAY

000 B

000 B
CABIN, OPSS

1
4

4
CN-56
CS-17

CN-57

CS-2

370

280

132
132
151
153
156

132
151
152
156
4

CS-73
2

2
FUSE BOX

ACCEL SIG
HORN,OPT

10

10
5

6
2
4

1
10
11
12
13
14
15
16
17
18
19
20

3
1
2
3
4
5
6
7
8
9

1
2
3
4
5
6
7
8

E
B
1 2

3
L

CR-43

CR-46

CR-47

CR-50

CR-51

CS-69

CS-41
1
2
3

CR-13

CR-11
CR-5
CN-36

10

10
2

6
1
3

4
5

4
5

8
9

9
1

1
4

4
2
2
3

2
3

2
3

2
3

2
3

6
3

3
2
4

2
4
1

1
000
186
185
1.25W
1.25W
1.25W
1.25W

1.25B
1.25B

1.25L
1.25L

112
103
111
745
176

306

187
185
782

152
184
153
124
128

125
126
123
151
000

735

121

122

135
000

202

177

151
000

153
152

182
182

151
000
135
178
183
131

000
173
181
184

000
175
182

774
702

705

000
176
770
106

000
172
172
211

186
129

302
180

129
129

303
304
702A
170
175
702
129
735
173
176
172
177
179
178
801
CN-4

CN-5
2

2
4

1
3

CN-9
1 2

CN-7
CN-8
177 R

3
4
5
6
2

2
1
153
184
151
000

152
184
151
000
TILT
130 B
ALARM

000
301
CN-26

177
202
LICENSE LAMP

000
132
151
156
152
153
CL-21
151 WG
CN-20 000 B
000
2
179 OPTION
1

TO:AIRCON HARNESS
CN-65
156 R
CN-17 BACK-UP
170 000 B BUZZER
1
129
2 CD-2
151 B 000
3 3 2 1
000 Y 122
4 2 CD-10
L 123 000
CABIN 1 3 Pa AIR CLEARNER
124 SWITCH
FUEL SENDER

GEAR SELECTOR CN-25 CS-72

170 COM
1 NC TILT
2-FWD(Lg) 150 000 L SWITCH
CS-11 2 2 NO
156 130 B
3-C(W)

1 HORN 1 COM NO NC
4-N(B) 157
2
176
3
1-REV(LgB) 183
4
STEERING COLUMN SWITCH

158 132
6-L(G) 5 CN-1 1 Pa BRAKE SW
7-C(R)

159 175
6 1 2 CD-4
5-H(Y)
180 179 179
7 2
122 122
3
5-C(Br)

123 123
4 CD-29
>

124 124
5 T/M OIL
6-ILL(Y) 125 125 125 TEMP SW.
6
126 126
7
153 103 103
7-Lo(Gr) 1 8
152 128 128
2 9
150 172 172
8-Hi(G) 3 10
000 130 130
4 11
173 131 131 CN-74
5 12
151 121 121 172
6 13 2 R
1-TLH(Lg) U
9-C(Or)

181 000 000 128

7 14 1 L
8
181
15
~
2-TRH(LgB) 182 103 103 3 G

G3
G2
G1
9 2 B+
4-HO(B) 101 101
3-HO(W) CS-12 1
ALTERNATOR
CN-15
SP1
COMBI.SWITCH CN-95
101
CN-2 1 FUSIBLE
150 150 100 LINK
1 2
150 151 151
2
HORN SW 000 152 152
3
153 153
CS-5 4 CR-23
201
5 1 W 2 1
175 175 131
CN-156 6 2
156 156 119
1 7 3
157 157 000
2 8 4 4 3
158 158
3 9 RELAY-START
159 159
4 10
170 170
5 11
768 301 301
6 12
719 106 106
7 13
202 202
8 14
DIAGNOSTIC 000 177 177
9 15 CR-24
304 304 106
10 16
11
12 GLOW RY
13
CN-80
14

305 V
170

129
301
156
157
302
303
000
306
305

170
185
15 GLOW PLUG
702
16
CN-45
770
745
858
857
801
211
768
719
782
183
753

735
774
705

CN-55
CN-113

10
11
12
13
14
119

1
2

1
2
3
4
5
6
7
8
9

000

000
000
M
M

161
159
163

162
158
164

162
157

161
157

163
156

164
156
CN-157

304 Or

304 Or
000 B

000 B
CN-6

201

Or

Gr

Br
W

R
Y

P
B

P
16
15
14
13
12
11
10
857

L
4

1
9
8
7
6

2
1

DO-1
DO-2
CAN 858 100
B+

2
2

3
1

1
743
770
745
858
857
801
211
768
719
782
183
753

774
705

2
OPS

CN-132

CN-122

CN-123

CN-133

1
2 1 2 1
START MOTOR

735,746

CN-134

CN-135
BUZZER

GND
IGN

RELAY2

RELAY3
OPS-LAMP
FWD S/W
REV S/W

BRAKE S/W
TRAVEL CUT
SEAT S/W

BATT(+)
PARK'G S/W
BUZZER(-)
FUEL
HEATER MAIN DIODE DIODE FWD-2 FWD-1 REV-1 REV-2 TILT LIFT
(L) (N) CUT OFF CUT OFF
EARTH 38SQ(B)
CN-124
758 38SQ(R) 38SQ(B)
2 3 IVS 6
- 5 BATTERY
P.D 1 MASTER SW
SENSOR

801 CN-7 12VX2

2
1
AMP 24Vdc 4
SW 825
PS VCC 3
721,722
SIG 2

211
000
6 4 835,836
NC G(ECU) 1
ACCEL PEDAL

802,840,841
HMC ENGINE WIRING
772,773
863
FUEL TEMP 163 CN-13
858 755 55 B 55
CAN1_L 158 1 E/E
162

1
137

CAN1_H 157
857 121
2
2P 2
2 G/U
WATER TEMP &
WTS 155
855 855 155 Y 155
3 ECU
GAUGE SENSOR
3
847 126 1Y
SCV HI 147 4
846 820 120 Y
SCV HI 146 5
845 831 131 B 120
SCV LO 145 6 1 SIG
CN-155

SCV LO 144
844 833
7
133 W 131
2 E/E
CAM SPEED
INJECTOR #2 143
843 133
3 VCC
SENSOR
8
842
INJECTOR #3 142
841
POWER G 141
840

895
896
POWER G 140
167

838 1 Pa E/OIL PS
143

INJ.#2 TWV4 138

837
INJ.#3 TWV2 137 CN-14
836 806 106 B
ACCEL GND 136 1
835 843 143 B
ACCEL GND 135 2
834 842 142 B
CRPS(GND) 134 3
102

129

833 807 107 B 40

CAM SPEED VCC 133 4 1
832 803 103 R 41 NE SENSOR
CRPS(SIG) 132 5 2
831 838 138 R
CAM SPEED G 131 6
828 837 137 R
BOOST SIG 128 7
CN-154

826 804 104 R 134

CRPS(VCC) 126 8 1 GND
825 121,132 COMMON RAIL
ACCEL ACC 125 9 2 SIG
894 S-1 126 PRESS SENSOR
ACCEL ACC 123 10 3 VCC
821 892 S-2
CRPS(SIG) 121 11
820
CAM SPEED 120 12
807 54
INJECTOR #4 107 13 1 GND
107

806 32
INJECTOR #1 106 14 2 NTC BOOST
136

804 57
INJ.#4 TWV3 104 15 3 +5V PRESSURE
803 845 144,145 Br 128
INJ.#1 TWV1 103 16 4 Vout
802 844
POWER G 102 17
18
70

97

107
19 1
739 S-5 104 INJECTOR #4
20 2
782 847 146,147 W
ENG. CHECK LAMP 82 21
735A 846
CN-153

+BF 76 22
774A 754 54 B 142
ECU RY.COIL 75 23 1
774 834 134 B 137 INJECTOR #3
ECU RY.COIL 74 24 2
773 740 40 R
EARTH(SIGNAL) 73 25
772
EARTH(SIGNAL) 72 26
770A 143
GLOW RELAY 71 27 1
INJECTOR #2
101

770 757 57 W 138

76

GLOW RELAY 70 28 2
768 826 126 W
DIAGNO SW 68 29
183 741 41 B
NEUTRAL SW 66 30
62

758 863 163 W 106

34

ACCEL IDLE 58 31 1
757 103 INJECTOR #1
SENSOR POWER 57 32 2
746A 828 128 Y
KEY SW 56 33
755 832 121,132 Y
SENSOR G 55 34
754 821 163
SENSOR G 54 35
55
2 C FUEL TEMP
753 755 55 B
CN-152

STOP LAMP SW 53 36 1 SENSOR

131
START SW 48 37
746 KEY ON 732 32 L
KEY SW 46 38
745 144,145
GLOW LAMP 45 39 2
OVER HEAT LAMP 43
743
40
146,147
1
SCV
741
NE - 41 41
740
NE + 40 42
40

69

739
NE SHIELD 39
735 BF+
+BF 35 HMC ENGINE WIRING
732
INTAKE AIR TEMP 32
28
1

772A
ECU CASE G 28
722
ACCEL SIG 22
721
ACCEL SIG 21
719
DIAGNOSTIC
CN-151

19
705B
ECU RELAY 7
705A
ECU RELAY 6
705
ECU RELAY 5
- 3
- 2
7

34

- 1

ECU 35D7EEL02

7-2
MEMORANDUM

7-3
 1. POWER CIRCUIT
The negative terminal of the battery is grounded to the machine chassis.
When the start switch is in the off position, the current flows from the positive battery terminal.
1) OPERATING FLOW
Battery(+) Start motor[CN-45(B+)]
Glow relay[CR-24] Glow plug[CN-80]
Start relay[CR-23]
Fusible link[CN-95] Alternator[CN-74(B+)] I/conn[CN-1(8)]
I/conn[CS-2(3)] Start switch OFF
Fuse box[No.1] I/conn[CN-2(11) → Horn[CN-25(1)]
Fuse box[No.3] I/conn[CN-2(6)] Brake switch[CD-4]
Flasher unit[CR-11(2) → (1)]
Hazard switch[CS-41(6, 5)]
Combi switch[CS-12(9)]

2) CHECK POINT

Engine Key switch Check point Voltage

① - GND (Battery(+))
② - GND (Fusible link)
OFF OFF ③ - GND (Fuse No.1) 24V
④ - GND (Fuse No.3)
⑤ - GND (Start key)

※GND : Ground

7-4
 POWER CIRCUIT

103
START KEY S/W
B BR R1 R2 C ACC
HT 1 2 3 4 5 6 7 8 9 10 11 12

10A

10A
OFF

10A

10A
20A

15A

10A

15A

20A
10A

5A

5A
ON
ST

AIR-CONDITIONER
ALT,FUEL HEATER
F/R SOL, GLOW RY
ILLUM/HEAD LAMP
TURN/STOP LAMP

WORK LAMP,OPT
ECU POWER RY.
W

ECU,CLUSTER
FUSE BOX
R

START RELAY
Y
L

CABIN, OPSS
HORN,OPT

ACCEL SIG

CN-36
CS-2

2
4

1
3

3 4
170
175

5
103

CN-1
CD-4
1
Pa
2 175
3
4
BRAKE SW
5
6

103
7
103
CN-74
8
2 R
9 U
1 L
CR-11
182 10 ~
L 1 11 103 3 G
G 175 2 B+
B 2 12 101
1
E 3 13 ALTERNATOR
CN-15
FLASHER UNIT 14
15
GEAR SELECTOR
2
CN-2 CN-95
150 150 101
1 1
2-FWD CS-11 100
2 2
3-C

1
4-N 3 FUSIBLE LINK
2 4
1-REV 3
5
4 175 175 CR-24
6
6-L 5
7
7-C

6 8
5-N 7
9 GLOW RY
10 CN-80
11
5-C

>

6-ILL 12
13
GLOW PLUG
CS-12
14
1
7-Lo 15
2 CR-23
150 16 1 w2 1
8-Hi 3
2
4
3
5 4 4 3
6
CN-25 START RY
170
1-TLH
1
7 150
9-C

2
8
182
2-TRH
9 HORN CN-45
M
4-HO 3-HO
201 M
100
B+
COMBINATION SWITCH
START MOTOR
182
182
CS-41
10

5
4

1
6

2
9

3
10

38R 38B 38B

BATTERY MASTER SW
12V X 2
9

7
8
2

HAZARD S/W
1

35D7EEL03

7-5
2. STARTING CIRCUIT
1) OPERATING FLOW
Battery(+) terminal Start motor[CN-45(B+)] Fusible link[CN-95] Start switch[CS-2(3)]
Start relay[CR-23]
※ The engine can be started only when the gearshift is in neutral position.
(1) When start key switch is in ON position
Start switch ON [CS-2(4)] Fuse box[No.4 →6] Combi switch[CS-12(5)]
(2) When start key switch is START position
Start switch START[CS-2(2)] Fuse box[No. 11] Neutral & anti restart relay[CR-5(2) → (4)]
I/conn[CN-1(12)] Start relay[CR-23]

2) CHECK POINT

Engine Key switch Check point Voltage

① - GND (Battery B+)

② - GND (Fusible link)
Running ON ③ - GND (Fuse box No.4, 11) 24V
④ - GND (Start key)
⑤ - GND (Anti restart relay)

※GND : Ground

7-6
STARTING CIRCUIT

CLUSTER START KEY S/W

B BR R1 R2 C ACC 111
HT
OFF
112

WATER TEMP GAUGE

ENG. OIL PRESSURE

ON 103
TURN SIGNAL LH

ST

EARTH(GAUGE)
CHARGE LAMP

ANTI RESTART
ILLUMINATION
T/M OIL TEMP

FUEL GAUGE
FUEL EMPTY
HEAD LAMP

W
1 2 3 4 5 6 7 8 9 10 11 12
AIR FILTER

Y
L

10A

10A
10A

10A
20A

15A

10A

15A

20A
10A

5A

5A
EARTH

IG

AIR-CONDITIONER
ALT,FUEL HEATER
F/R SOL, GLOW RY
ILLUM/HEAD LAMP
TURN/STOP LAMP
-

WORK LAMP,OPT
ECU POWER RY.

ECU,CLUSTER
CN-57
CN-56

FUSE BOX

START RELAY
CS-2

CABIN, OPSS
2
4

1
3

HORN,OPT
11
12
13
14
15
16
17
18
19
20

ACCEL SIG
1
2
3
4
5
6
7
8

CN-36
111
112
103
128

135

178
173
3

5 CN-1
CR-5 1
131
3 4 4 2
183
3 3
178
2 4
135
1 2 1 5
NEUTRAL & ANTI 6
RELAY 7
CN-74
103 103
8 2 R
128 128 U
9 1 L
10
~
103 3 G
11 2 B+
131 131 101
12 1
ALTERNATOR
13 CN-15
14
15 2
CN-95
101
1
100
2

GEAR SELECTOR FUSIBLE LINK

2-FWD CS-11
3-C

1
4-N
2
1-REV 3
183
4
CR-23
6-L 5
1 w2 1
7-C

6 2
5-N 7 3
4 4 3
START RY
5-C

>

6-ILL

CS-12 CN-45
M
7-Lo
1
2
M
8-Hi 3 100
4 B+
173
5 START MOTOR
6
1-TLH 7
9-C

8
2-TRH
9 38R 38B 38B
4-HO 3-HO

BATTERY MASTER SW
12V X 2
COMBINATION SWITCH 1

35D7EEL04

7-7
3. CHARGING CIRCUIT
When the starter is activated and the engine is started, the operator release the start switch to the ON
position. Charging current generated by operating alternator flows into the battery.
The current also flows from alternator to each electrical component through the fusible link(CN-60)
and the fuse box.
1) OPERATING FLOW
(1) Warning flow
Alternator[CN-74(L)] I/conn[CN-1(9)] Cluster charging warning lamp ON [CN-56(14)]
(2) Charging flow
Alternator[CN-74(B+)] Starter[CN-45(B+)] Battery(+) terminal Charging

2) CHECK POINT
Engine Key switch Check point Voltage

① - GND (Alternator B+)

ON ON ② - GND (Start switch) 24V
③ - GND (Cluster)
※ GND : Ground
※ Cautions
1. When using an arc welder, always disconnect the ground lead from the battery to prevent alternator
or battery damage.
2. Attach the welding ground clamp as close to the weld area as possible to prevent welding current
from damaging the bearings of the alternator.
3. Do not disconnect the battery when the engine is running. The voltage surge can damage the
diode and resistors in the electrical system.
4. Do not disconnect an electric wire before the engine is stopped and the switches are OFF.

7-8
 CN-56
11 HEAD LAMP
12 TURN SIGNAL LH
13 AIR FILTER
128
14 CHARGE LAMP
15 HOUR METER(JUMP)
16 T/M OIL TEMP

3
17 ENG. OIL PRESSURE
18 FUEL EMPTY
19 ILLUMINATION
20 EARTH

1 IG CLUSTER
2 -
3 WATER TEMP GAUGE
CHARGING CIRCUIT

4 -
5 FUEL GAUGE
6 -
7 ANTI RESTART
8 EARTH(GAUGE)
CN-57

CS-2
112
ST
HT

ON
OFF

4
103 R
B

3
W
2
L
BR R1

2 1
Y
START KEY S/W
R2 C ACC

7-9
FUSE BOX
103
112

HORN,OPT 10A
1

TURN/STOP LAMP 10A

172
128
103
2

ECU POWER RY. 20A

3

CABIN, OPSS 15A

4

9
8
7
6
2

4
1

5
3

15
14
13
12
11
10
ECU,CLUSTER 10A
5

CN-1

ILLUM/HEAD LAMP 10A

6

F/R SOL, GLOW RY 10A

7

172
128
103 172 ALT,FUEL HEATER 15A
8

WORK LAMP,OPT 10A

AIR-CONDITIONER 20A

START RELAY 5A

ACCEL SIG 5A

1
9 10 11 12

100
1
2
CN-36

CN-15

38R
172
128

103
101

201

12V X 2
1
2

BATTERY
L
R

38B
B+

M
101
100

B+
CN-74

CN-45
4
3
2
3

CR-23
2
1

4
1 w2
G
U

M
ALTERNATOR
~

CN-95

3
1

START MOTOR
START RY

MASTER SW
FUSIBLE LINK

35D7EEL05
2

38B
4. PREHEATING CIRCUIT
Combustion chamber glow plugs are used in order to give satisfactory starting of low ambient
temperatures.
1) OPERATING FLOW
Battery(+) terminal Fusible link[CN-95] I/conn[CN-15(1)] Alternator[CN-74(B+)]
I/conn[CN-15(2)] I/conn[CN-1(8)] I/conn[CS-2(3)] Start switch
Glow relay[CR-24]
※ When you turn the start switch to the ON position, the glow relay makes the glow plugs operated
and the glow lamp of the cluster turned ON.
Start switch ON [CS-2(4)] Fuse box [NO.4→7]
Glow aux relay[CR-46(2)→(4)] I/conn[CN-2(13)] Glow relay ON[CR-24(2)]
Glow plug operating[CN-80]
Cluster[CN-56(2)] Glow lamp ON

2) CHECK POINT

Engine Key switch Check point Voltage

① - GND (Battery B+)

② - GND (Fusible link)
③ - GND (Glow plug)
Stop HEAT 24V
④ - GND (Glow relay)
⑤ - GND (Start switch)
⑥ - GND (Glow lamp)

7-10
 PREHEATING CIRCUIT

CLUSTER START KEY S/W

B BR R1 R2 C ACC 111
HT
112
OFF

ENGINE CHECK LAMP

WATER SEPARATOR
ON 103

TURN SIGNAL RH
ST

PARKING BRAKE
BRAKE OIL LOW
GLOW LAMP(+)
GLOW LAMP(-)

OPSS LAMP

W
1 2 3 4 5 6 7 8 9 10 11 12
SEAT BELT

Y
L

10A

10A
10A

10A
20A

15A

10A

15A

20A
10A

5A

5A
AIR-CONDITIONER
ALT,FUEL HEATER
F/R SOL, GLOW RY
ILLUM/HEAD LAMP
TURN/STOP LAMP
-

WORK LAMP,OPT
ECU POWER RY.

ECU,CLUSTER
FUSE BOX
CN-56

START RELAY
CS-2

CABIN, OPSS
2
4

1
10

HORN,OPT

ACCEL SIG
1
2
3
4
5
6
7
8
9

CN-36
5
112
103
111
6
176

801
176

179
170
CN-17
170
1
2
3
4
OPTION
CR-46
106
3 4 4
3 CN-1 CN-20
176
2 1 2
179 179
1 2 1 2 1

GLOW AUX. 3 TO.AIRCON HARNESS

RELAY 4
5
6
7
103 103
8
9
10
11
12
13
14
CR-24
15

GEAR SELECTOR
GLOW RY
2-FWD CS-11
CN-80
3-C

1
4-N
2
176
CN-2
1-REV 3 1 GLOW PLUG
4 2
6-L 5 3
7-C

6 4
5-N 7 5
6
7 CN-74
5-C

>

6-ILL 8 2 R
U
9 1 L
CS-12
10
~
1 103 3 G
7-Lo 11 2 B+
2 101
12 1
8-Hi 3 106 106 ALTERNATOR
13 CN-15
4
14
5
6
15 2
16 CN-95
1-TLH 7 101
9-C

1
8 100
2-TRH 2
9
CN-6 FUSIBLE LINK
4-HO 3-HO
1
2 CN-45
3
M
COMBINATION SWITCH 4 M
5
100
6 B+
7
START MOTOR
8

CN-124 9
3 IVS 1 10
2
801 801 801
- 2 11
P.D 1
SENSOR

AMP 24Vdc 3 38R 38B 38B

SW
12
PS VCC 4
13
SIG 5
6 4
NC E(ECU) 6 14
BATTERY MASTER SW
15 12V X 2
ACCEL PEDAL
16 1
35D7EEL06

7-11