Lull 944E-42 Service Manual - Manual (Page 608)

Electrical System
9.98 Model 644E-42/944E-42 Rev. 6/04
9.8.33 Single Joystick - Boom Lift/Lower Circuit & Troubleshooting (Option)
Schematic is drawn with the ignition switch in the RUN position.
A
B
AX A
B
TR A
B
HO A
B
EXT A
B
CTA A
B
CTB A
B
SOLENOIDS
PROPORTIONAL
SOLENOIDS
SJG6
PWM DRIVER
BOARD
JOYSTICK
MALE
CONNECTOR 3 4 5 6 1 2
RED
-
+12V DC / B+
EC2
BLACK
-
GROUND / B-
GREY
-
PWM RETURN
PURPLE
-PWM F
TIL
T
EC3
YELLOW
-
SWITCH CONTROL
OUTPUT
(NO)
EC1
(+5V)
ORANGE
-
PWM R
TIL
T
PROPORTIONAL
ROLLER
TRIGGER
SWITCH
SINGLE
JOYSTICK
CONTROL
IGNITION
RELAY
87A 87
30
86
85
IG1 BA4
BA3
RG3
To
Transmission
Control Relay
To
Neutral
Start
Relay
12V BUSS BAR
HYD
JOYSTICK
CONNECTOR
F1 40
OPEN CAB
VEHICLE MAIN
F2 15
IGNITION
CONTROL
BA1A
BA3
B
BA4
D F4 20
FUEL
SOLENOID
TRANSMISSION
F3 15 C
4
3
2
1
A
FJ1
PB1
FJ3
5
FJ4
6
FJ5
7
FJ6
8
FJ7
9
10
F8 10
DASH PANEL
H
F7 10
STABILITY
CIRCUIT
G
F F6 10
BACK-UP
ALARM/HORN
F5 20
IGNITION
POWER
E
I
F10 5
AUXILIARY
HYDRAULICS
J
FJ2
F9
OPEN
A
B
A
B AHG2
AHG1
105
AH2A
20
AUXILIARY
HYDRAULIC
SOLENOIDS
AH2B
AH2
10
PB2A
PB2
IG1
PB1
To
Park Brake
Switch
A
B AH A
A
B
AH B
AH1
AH2
AHG6
C
B
A
C
A
B BA1A
POWER
MALE & FEMALE
CONNECTORS
A
B
C BA1
AH2B
IGNITION
SWITCH
ACC IGN
B+
OFF
ACC
IGN
ST
JOYSTICK
MALE
CONNECTOR 4 3 2 1 6 5
+12V DC / B+ N.C. HALL
EFFECT
OUTPUT
+5VDC SWITCH OUTPUT
(NO)
AGND
PROPORTIONAL
ROLLER
TRIGGER
SWITCH
SINGLE
JOYSTICK
CONTROL
JOYSTICK
JUMPER
HARNESS
MALE
CONNECTOR 3 4 5 6 1 2
JOYSTICK
JUMPER
HARNESS
FEMALE
CONNECTOR
4 3 2 1 6 5
Black
Red
Green
Grey
White
Purple
Orange
Blue
Black Red
Green
Grey
White Blue
Purple Orange
Red
Yellow
Yellow
CONTROL
MODULE
JUMPER
HARNESS
FEMALE
CONNECTOR
3
4
5
6
1
2
9
10
11
12
7
8
15
16
17
18
13
14
21
22
23
19
20
3
4
5
6
1
2
9
10
11
12
7
8
15
16
17
18
13
14
21
22
23
19
20
SINGLE
JOYSTICK
CONTROL
MODULE
+5VDC
PWM Return
Ground
Power
AGND
Hall Effect Output
PWM Forward Tilt
PWM Reverse Tilt
TAA
300
SJG1
AH1A
SCO
AH1C SJG3
TA
JOYSTICK
FEMALE
CONNECTOR
SCO
3 4 5 6 1 2
SJG2
AH1B
315
SJG2
SJG3
305
AH1A
AH1C
SINGLE
JOYSTICK
CONNECTOR
SINGLE
JOYSTICK
RELAY
86
85
87A 87
30
SINGLE
JOYSTICK
PILOT SELECT
VALVE
STARTER
GND (-)
+
+
-
BATTERY 1
ENGINE
BLOCK
AHG5 CAB GRND
STUD
AH3A
290 1 2 3 4 5 6 7 8
AH3B
AH4 295
A
B
AHG3
AH4
AHG6
AH3
C
B
A
RG2
AH1
SJG1
7
3
2
8 295
A
B AHG4
AUXILIARY HYDRAULIC
PRESSURE RELEASE
VALVE SOLENOID
A
B
AHG5 AHG3 AH3A
AH3B
290
AH4 AUXILIARY
HYDRAULIC
PRESSURE
RELEASE
SWITCH
2
3
7 8 1 CAB GRND
STUD
AH4
AH3
AHG6 Hyd. Joystick Conn.
Aux.
Hyd.
Fuse
MU6730
Late Production
Single Joystick
Early
Production
Single Joystick,
Harness &
Control Module
644E-42, SN 20118 & Before,
0160002519 thru 0160003108,
944E-42, SN 20123 & Before,
0160002514 thru 0160003106