4 -3

GROUP 2 ELECTRICAL CIRCUIT

4 -4

1. POWER CIRCUIT The negative terminal of battery is grounded to the machine chassis through master switch.When the start switch is in the OFF position, the current flows from the positive battery terminal asshown below.

OPERATING FLOWBattery Battery relay Fusible link CN-60(1)

Fuse box(No.11) I/conn CN-1(8) Start switch CS-2(1)Fuse box(No.12) I/conn CN-2(17) I/conn CN-6(4) Room lamp CL-1(2)

Cassette radio CN-27(7)Fuse box(No.13) CPU controller CN-53(3)Fuse box(No.14) I/conn CN-2(3) Flasher unit CR-11(2)

I/conn : Intermediate connector

CHECK POINT

4 -5

Engine Start switch Check point Voltage

OFF OFF

- GND(Battery 1EA)

- GND(Battery 2EA)

- GND(Battery 2EA)

- GND(Fusible link)

10~12.5V

20~25V

20~25V

20~25V

GND : Ground

1)

2)

POWER CIRCUIT

4 -6

FUSE BOX

BATTERY RELAYMASTER SW

CASSETTE RADIO

START KEY SW

3

4

21

_ + _ +

ROOM LAMP

CPU CONTROLLER

CN-6

CL-1

CN-27

CS-2

CN

-60 C

R-1

CN

-53

CN-36

CN

-1

CN

-2

FLASHER UNIT

CR-11

2. STARTING CIRCUIT

OPERATING FLOWBattery(+) terminal Battery relay(M8, B+ terminal) Fusible link CN-60(1)

Fuse box(No.11) I/conn CN-1(8) Start switch CS-2(1)

When start key switch is in ON positionStart switch ON CS-2(2) I/conn CN-1(7) Battery relay M4 terminal

Battery relay operating(All power is supplied with the electric component)Start switch ON CS-2(3) I/conn CN-1(6) Fuse box(No.4) I/conn CN-3(5)

Fuel cut-off CN-79(1)

When start key switch is in START positionStart switch START CS-2(5) I/conn CN-1(5) Start safety relay CR-5(2) (4)

I/conn CN-5(2) Start relay CR-23(1)

CHECK POINT

4 -7

(1)

(2)

Engine Start switch Check point Voltage

OPERATING START

- GND(Battery)

- GND(Start key)

- GND(Battery relay M4)

- GND(Start B+)

- GND(Start M)

- GND(Start relay)

- GND(Battery relay M8)

20~25V

GND : Ground

2)

1)

STARTING CIRCUIT

4 -8

MASTER SW BA

TT

RY

CPU CONTROLLER

FUEL CUT OFF

1

7

3

_ + _ +

CN-51

CN-79

CN

-60

DO

-1

CR

-1

FUSE BOXCN-36

CN-3

START KEY SW

STARTER

START RY

ALTERNATOR

5

CR-23

CN-45

M

CN-74

4

CN-5

CN-7

CN-8

6

START SAFETY RY

CR-5

CN

-1

CN

-2

MULTI-FUCTION SW

CS

-13

DO

-3

DO

-2

CS-2

2

3. CHARGING CIRCUITWhen the starter is activated and the engine is started, the operator releases the key switch to the ONposition.Charging current generated by operating alternator flows into the battery through the Batteryrelay(CR-1).The current also flows from alternator to each electrical component and controller through the fusebox.

OPERATING FLOW

Warning flowAlternator "I" terminal I/conn CN-5(4) CPU Alternator power level CN-50(5)

Cluster charging warning lamp

Charging flowAlternator B+ terminal Battery relay(M8) Battery(+) terminal

CHECK POINT

4 -9

2)

(1)

(2)

Engine Start switch Check point Voltage

RUN ON

- GND(Battery voltage)

- GND(Battery relay)

- GND(Alternator B terminal)

- GND(Alternator I terminal)

20~30V

GND : Ground

1)

CHARGING CIRCUIT

4 -10

CPU CONTROLLER

STARTER

START RY

ALTERNATOR

CLUSTER

43

CN

-9C

N-5

6

CR-23

CN-51

CN-45

CN-74

MASTER SW

BA

TT

RY

1

2_+

_+

CN

-60 C

R-1

DO

-3

M

FUSE BOXCN-36

CN-5

CN-50

5

CN

-1

4 -11

4. HEAD LIGHT AND CLEARANCE LAMP CIRCUIT

OPERATING FLOWFuse box(No.6) I/conn CN-1(4) Main light switch CS-21(4)

l/conn CS-12(1) RH multifunction switch(lG)passing function operating by RH multifunction up and down.

Main light switch ON : 1st stepMain light switch ON CS-21(5) Switch indicator lamp ON CS-21(9)

I/conn CN-2(12)Cluster illumination lamp ON CN-52(4)Fuse box(No.19) LH clearance lamp ON

Rear : CL-15(1), Front : CL24(1)Fuse box(No.20) RH clearance lamp ON

Rear : CL-16(1), Front : CL25(1)Number plate lamp ON CL-21(2)

Main light switch ON : 2nd stepMain light switch ON CS-21(2) I/conn CS-12(2) orRH multifunction switch : LoI/conn CS-12(4) Head light low beam ON CL-3(1), CL-4(1)RH multifunction switch :HiI/conn CS-12(6) Head light low beam ON CL-3(2), CL-4(2)

CHECK POINT

(1)

(2)

Engine Start switch Check point Voltage

STOP ON

- GND(Fuse box)

- GND(Switch power input)

- GND(Switch power output)

- GND(Switch power output)

- GND(Switch power input)

- GND(Head lamp)

- GND(Clearance lamp)

- GND(Numberplate lamp)

20~25V

GND : Ground

2)

1)

4 -12

HEAD LIGHT AND CLEARANCE LAMP CIRCUIT

4

MAIN LIGHT SW

FUSE BOXCN-36

CN-1

MULTI-FUNCTION SW

CN-2

HEAD LAMP

CL-

3

HEAD LAMP

CL-

4

FRONT COMBI RH

REAR COMBI RH

REAR COMBI LH

CL-25

CL-16

CL-15

FRONT COMBI LH

CL-

24

NUMBERPLATE LAMP

CL-21

CS

-21

CS

-12

1

2

3 5

6

7

8

CLUSTER

CN

-52

7

4 -13

5. WORK LAMP CIRCUIT

OPERATING FLOWFuse box(No.9) I/conn CN-1(23) Work light switch CS-36(5)

Work light switch CS-36(6)

When work light switch ONWork light switch ON CS-36(1), (2) I/conn CN-1(24) Cluster work lamp ON CN-52(8)

I/conn CN-10(2)Work light ON CL-5(2), CL-6(2)

Switch indicator lamp ON CS-36(9)

CHECK POINT

Engine Start switch Check point Voltage

STOP ON

- GND(Fuse box)

- GND(Switch power output)

- GND(Switch power input)

- GND(Cluster work lamp)

- GND(Work lamp)

20~25V

GND : Ground

2)

1)

4 -14

WORK LAMP CIRCUIT

FUSE BOXCN-36

CN-1

WORK LAMP SWITCH

CN-10 CL-6

CL-5

WORK LAMP

CLUSTER WORK LAMP

CS

-36

CN

-52

1

32

4

5

5

4 -15

6. BEACON LAMP CIRCUIT

OPERATING FLOWFuse box(No.8) I/conn CN-1(30) Beacon lamp switch CS-23(2)

When Lamp switch ONBeacon lamp switch ON CS-23(6) Switch indicator lamp ON CS-23(9)

I/conn CN-6(6) I/conn CN-14(3)Beacon lamp ON CL-7

CHECK POINT

Engine Start switch Check point Voltage

STOP ON

- GND(Fuse box)

- GND(Switch power input)

- GND(Switch power output)20~25V

GND : Ground

2)

1)

4 -16

BEACON LAMP CIRCUIT

BEACON LAMP

CN

-14

CL-

7

CN

-6

FUSE BOXCN-36CN-1BEACON LAMP SW

CS

-23

132

44

4 -17

7. WIPER AND WASHER CIRCUIT

OPERATING FLOW

Fuse box CN-36(No.10) Inter wiper relay CR-6(4)Wiper relay CR-4(2), (4)Washer tank CN-22(2)I/conn CN-2(14) I/conn CN-6(2) I/conn CN-13(3)Wiper motor CN-21(3)

Washer switch ONWasher switch ON CS-11(2) (1) I/conn CN-2(8)

Inter wiper relay CR-6(1) (3) I/conn CN-2(5)Wiper switch CN-11(7) (5),(6) I/conn CN-2(9)Wiper relay CR-4(6) (1) I/conn CN-2(13)I/conn CN-6(1) I/conn CN-13(1) I/conn CN-21(1)

Wiper motor operatingWasher tank CN-22(2) (1) Washer operating

Wiper switch ON : INT PositionWiper switch ON CS-11(2) (4) I/conn CN-2(2) Inter wiper relay CR-6(6) (4),

CR-6(4) (3) ON/OFF I/conn CN-2(5) Wiper switch CS-11(7) (5)I/conn CN-2(9) Wiper relay CR-4(6) (1) I/conn CN-2(13)I/conn CN-6(1) I/conn CN-13(1) I/conn CN-21(1)Wiper motor intermittently operating

Wiper switch ON : Low and Hi PositionWiper switch ON CS-11(2) (5) or (6) I/conn CN-2(9) Wiper relay CR-4(6) (1)

I/conn CN-2(13) Wiper switch CN-6(1) I/conn CN-13(1)I/conn CN-21(1) Wiper motor operating

Auto-parking(When switch OFF)Wiper motor CN-21(1) OFF Fuse box CN-36(No.10) I/conn CN-2(14)

I/conn CN-6(2) I/conn CN-13(3) Wiper motor CN-21(3) (4)Wiper motor stop

CHECK POINT

1)

2)

(1)

(2)

(3)

(4)

Engine Start switch Check point Voltage

STOP ON

- GND(Fuse box)

- GND(INT wiper relay)

- GND(INT wiper RY washer output)

- GND(INT wiper RY INT power output)

- GND(INT wiper RY power input)

- GND(INT power RY INT output)

- GND(Relay power input)

- GND(Relay coil)

- GND(Relay output)

- GND(Wiper power input)

- GND(Wiper motor)

20~25V

GND : Ground

4 -18

WIPER AND WASHER CIRCUIT

CN-2

MULTI-FUNCTION SW

CS

-11

WASHER TANK

WIPER RELAY

INTER WIPER RELAY

WIPER MOTOR

CN-21 CN-13

CN-6

FUSE BOXCN-36

CR-6

CR-4

CN-22

1

4

5

10

10

3

2 9

67

81011

4 -19

CONTROLLER CIRCUIT

CPU CONTROLLER

CN-53

CN-52

CN-51

CN-50

FUSE BOXCN-36

CN

-47

CN-76

CN-3

CD

-17

TACHO SENSOR

DC MOTOR

CS-7

CN-75

RESISTOR

PROLIX SW

EPPR VALVE

4 -20

CPU CONTROLLER

BREAKER SW

PEDAL

CS

-26

CS

-27

SAFETY SW

CS-4

ARM HALF SW

CS

-50

CS

-25

DZR/OUTRIGGER SELECT SW

CS

-29

POWER MAX

CS

-67

QUICK COUPLING SW

MULTI-FUNCTION SW

CS

-13

CN-1

CN-2

SAFETY SOL REV SOL FWD SOLARM HALFSOLENOID

DOZERO/RIGGERSOL

CN

-68

CN

-123

CN

-122

CN

-89

CN

-72

CN

-36

FUSE BOX

CN

-53

POWER MAX

CN

-88

TRAVEL

CN

-70

QUICK COUPLING

CN-15 CN-140

BACK-UP RELAYBREAKER SOLBACK BUZZER

CN

-65

CN

-66

CR

-30

CN

-50

ELECTRIC CIRCUIT FOR HYDRAULIC

4 -21

h

HOUR METER

CPU CONTROLLER

CN-1

CN-2

CN-48

CLUSTER

CN-9 CN-56

CN

-36

FUSE BOX

CN

-53

CN

-51

CN

-50

HYD TEMP

FUEL SENDER

CD-1

CD-2

WATER TEMP

CD-8

ENG OIL PS

CD-18

WATER LEVEL

CD

-16

CN-5

CN-3

MONITORING CIRCUIT

4 -22

CN-2

CPU CONTROLLER

CN-1

CN

-36

FUSE BOX

CN

-53

CN

-51

CN

-50

HAZARD SW

PARKING SW

RAMLOCK SW

CS-18

CS-17

CS-41

CS-15

MULTI-FUCTION SW

CS

-12

WARNING INDICATOR

CN-64

CN-63

RAM LOCK PARKING

WORKING BRAKE

CD-38

CN

-69

CN

-71

BRAKE PS T/M PS

CD

-3

CD

-5

INDICATOR CIRCUIT