JCB 3CX / 4CX / 2CX Fuse box and Relay Diagram

No.

Function/component

A

Column "A"

1

Hydraulic Auxiliary Equipment, Smooth Running System

10

2

Fuel pump solenoid (engine stop)

5

3

Indicators

7.5

4

Proximity switches for control modes

7.5

5

Gearbox control, transmission

10

6

Powered rear window

20

7

Brake lamps

5

8

Four wheel drive (automatic brake)

3

9

Left sidelights

3

10

Right sidelights

3

Column "B"

1

Instruments, buzzer

5

2

Front Horn, Front Wiper/Washer

15

3

reverse signal

7.5

4

Heated seat, cigarette lighter, face level fan

15

5

Rear wiper/ washer

5

6

brake switch

10

7

Rear work lights

25

8

dipped beam

20

9

Front work lights

25

10

Spare parts

-

Column "C"

1

Fog lamp.                                                                                 

3

2

high beam

7.5

3

Hazard warning signal lights

15

4

Beacon, interior lighting

10

5

Radio

5

6

Thermostat

20

7

heater

30

8

Ignition relay coils

3

9

high beam headlights

15

10

dipped headlights

15

ЗСХЕ

No.

Function/component

A

Column "A"

1

Junction box

10

2

Fuel pump solenoid (engine stop)

5

3

Indicators

7.5

6

Spare parts

-

5

Gearbox control, transmission

10

6

Thermostat

20

7

Brake lamps

5

8

Spare parts

-

9

Spare parts

-

10

Ignition relay coils

3

Column "B"

1

Instruments, buzzer

5

2

Front horn

15

3

reverse signal

7.5

4

brake switch

10

5

Rear work lights

25

6

Front work lights

25

7

Hazard warning signal lights

15

8

Beacon, interior lighting

10

9

Side instrument panel

3

10

Spare parts

-

No.

A

Protected circuit

Column "A"

1

10

Auxiliary hydraulics

2

5

Fuel pump solenoid (engine stop)

3

7.5

Direction indicators

4

7.5

Proximity turn mode switch

5

10

Transmission, gearbox control

6

3

Gear selection - forward/reverse - latching torque converter speed sensors (if equipped)

7

5

Stop Lights (Vehicles S/N 495455 to 933756)

7

10

Transmission

8

3

4-wheel drive (automatic brakes) (vehicles with serial number 495455 to 933756)

8

7.5

Stop lights

9

5

Left hand headlights

10

5

Right hand headlights

Column "B"

1

5

Devices, call

2

15

Front horn, front wiper/ washer

3

7.5

Rear horn

4

15

Seat heating, cigarette lighter, fan

5

10

Rear wiper/ washer

6

10

brake switch

7

5

Return to Digging, Smooth Ride System (SRS)

8

25

Rear work light

9

20

Headlights

10

25

Front work light

Column "C"

1

7.5

Lighting

2

15

emergency headlight

3

10

Signal beacon, interior lighting

4

5

Radio

5

20

Thermostat

6

30

Heater

7

3

Ignition relay coils

8

15

Main headlight

9

3

Anti-fog headlight

10

15

low beam headlight

Relay

1

Ignition relay 1

2

Hammer

3

Auxiliary relay (jaw bucket)

4

Main lighting relay

5

Engine start relay

6

Hydraulic Speed Control Relay (HSC)

7

Buzzer

8

Buzzer

9

Ignition relay 2

10

Front work light relay

11

Rear work light relay

12

direction indicator

13

Neutral start

14

Rear horn relay

15

Parking brake lamp relay

16

A/C compressor relay

17

Parking brake relay

No.

Relay

A

Heater

B

direction indicator

C

Ignition

D

Ignition

E

Neutral start

F

call

G

Infrequent wiping/windshield washing switch

H

Rear work light

J

Front work light

K

rear horn

L

Braking on 2/4 wheels

M

Engine run

N

Auxiliary (sliding bucket)

R

reverse signal

Q

Hydraulic speed control

R

Hammer

S

Main headlights

T

2 wheel drive

U

Parking brake

No.

Relay

1

Reserve

2

Reverse

3

Back (ratio high/low)

4

Forward (ratio high/low)

5

Disable gears

6

Move forward

7

Cardan shaft lock

8

Stroke (intermediate shaft / main shaft)

No.

Relay

1

Disable gears

2

Move forward

3

Reserve

4

Reverse

No.

A

Protected circuit

1

30

Hazard warning signal lights, portable signal light, headlights

2

50

Windshield washer/wiper, transmission, indicators

3

50

Working lights, fog lights, brake sidelights

4

50

Ignition, heater, thermostat

No.

Relay

B

Ignition

C

Starting in neutral

D

Indicators

E

Ignition

F

Front work lights

G

Transmission reset

H

Rear work lights

J

Forward travel

K

Buzzer

L

Parking brake

M

Reverse

N

reverse signal

No.

Relay

1

Ignition

2

Starting in neutral

3

Indicators

4

Ignition

5

heater

6

Transmission reset

7

Hydraulic Speed Control (HSC)

8

Forward travel

9

Buzzer

10

Parking brake

11

Reverse

12

reverse signal

13

Front work lights

14

Work lights (only for machines destined for delivery to Italy and Germany)

15

Headlights

16

Rear work lights

17

Pulse washer/wiper

18

Brake on all wheels (standard machines)

18

Reverse buzzer (for machines with automatic gear shifting)

19

Forward ratio high/low ¹⁾

20

Two wheel drive ²⁾

21

Automatic hydraulic speed control (HSC)

22

Back ratio high/low ¹⁾

23

Drive (transmission shaft/main shaft) ¹⁾

24

PTO shaft lock ¹⁾

25

Four wheel steering ³⁾

26

Two wheel steering ³⁾

27

Hammer chain

28

Control relay 1 ³⁾

29

Control relay 2 ³⁾

30

Additional device (jaw)

No.

Relay

1

Ignition

2

Neutral start

3

Indicators

4

Ignition

5

Heater

6

Parking brake

7

Hydraulic speed control

8

Auxiliary hitch (cheek)

9

Sound signal

10

Hydraulic speed control

11

Hammer

12

reverse signal

13

Front work lights

14

Working lights (only required in Italy, Germany)

15

Headlights

16

Rear work lights

17

Intermittent wiper/flush function

18

Reverse signal

19

Two-wheel brake (only for ZSH)

No.

A

Protected circuit

1

40

Hazard alarms, brake lights, face-level fan, portable signal light, headlights

2

50

Windshield washer/wiper, transmission, indicators

3

60

Work lights, fog lights, brake lights

4

50

Ignition, heater, thermostat

5

120

Battery heater for cold start (if equipped)

6

20

Hot drink dispenser (if fitted, machine option AEC only)