Lull 944E-42 Service Manual - Manual (Page 614)

Electrical System
9.104 Model 644E-42/944E-42 Rev. 6/04
9.8.35 644E-42 Engine With Optional Cold Start Circuit & Troubleshooting
Schematic is drawn with the ignition switch in the START position.
OPEN RELAY
POSITION
86
85 87A 87
30
RG6
RG5
125
Amp
Fuse
125
Amp
Fuse
+
-
BATTERY
2
ENGINE
BLOCK
+
-
BATTERY
1
1 2
3
4
ENGINE GRID
HEATER RELAY 2
GROUND BUSS BAR
GB2
GB1
ST4A
FR1
ST1
C
B
A
GB2
GB1
ST2
A
B
C BA1
TR9
TR7
8
6
SHIFTER
ZF TRANSMISSION
8
6
B+
NEUTRAL
F
N
R
4
1
2
3
IGNITION
SWITCH
ACC IGN
B+
OFF
ACC
IGN ST
VP1 DIODE PACK
A B C F
LIGHT
POWER
RELAY
(OPTION)
87A 87
30
86
85
PB4
RG1
TR8
TR9
TRANS.
CONTROL
RELAY
87A 87
30
86
85
PB6B
IGNITION
RELAY
87A 87
30
86
85
IG1 BA4
BA3
TR7A
NEUTRAL
START
RELAY
87A 87
30
86
85
NS2
NS1
CAB
POWER
RELAY
(OPTION)
87A 87
30
86
85
DG
BOOM
SWITCH
RELAY
87A 87
30
86
85
BACK-UP
ALARM
RELAY
87A 87
30
86
85
RG2
RG9
RG3
RG4
RG7
RG8
TR8
F1 40
OPEN CAB
VEHICLE MAIN
DG
F2 15
IGNITION
CONTROL
BA1A
BA3
B
BA4
C
A
B BA1A
PB3A
10
PB2A
PARK BRAKE SWITCH
E
D
E
1
2
3
4
5
6
7 8
D
1
2
D F4 20
FUEL
SOLENOID
TRANSMISSION
F3 15 C
4
3
2
1
STABIL.
LOCK
RELAY
87A 87
30
86
85
25
TR7
PB2
5
PB3
PB3
NS1
IG1
1
7
6
3
RG6
PB1
PB6
15
PB6B
CAB
GRND
STUD CG3 85
PB6A
PB6A
POWER
MALE
AND FEMALE
CONNECTOR
TR7A
PB3A
A
FJ1
PB1
PB2B
2
5
8
PH
SENSOR
FEMALE AND MALE
CONNECTOR
PH PH1
8 9 10 11
INSTRUMENT
PANEL
J8
GR
OUND
J9
PO
WER
TURN SIGNAL (OPTIONAL)
J10
ENGINE PRE-HEA
T
J11
K K
A
B
C
D
E
F
ST4A
ST3
POWER
FEMALE
AND MALE
CONNECTOR
A
B
C
D
E
F NS2
ST4
12V BUSS BAR
STARTER
GND (-)
+
BA1
C
B
A
270
FSG2 FSG1
260
ST4C
ST4B
ST4D
265
FR2B
FR2A FR2C
FUEL
SHUTOFF
SOLENOID
BLK
WHT
RED
C
B
A
C
B
A
FSG2
ST4C
FR2B
EG9
C2
TEMPERA
TURE SENDER
BA
TTER
Y VOL
TAGE (-)
C1
WAIT
TO ST
AR
T LAMP
SOLENOID 1 SOLENOID 2 CRANK CASE BA
TTER
Y VOL
TAGE (+)
HEATER
CONTROL
MODULE
TS1
HMG GH1C
GH2C
FR2C
ST4D
FR1
FR3 FRG
ST1
SRG ST3
FSG
FRG FSG
FR2
95
EG2
1 2
3
4
ENGINE
START
RELAY
1 2
3
4
FUEL
SHUTOFF
RELAY
FR2
PH1 PH1A
GH2B
GH1
GH2
PH1A
VP4
DIODE PACK
F
E
B
A
VP5
DIODE PACK
A
B
C
F
GH1B
GHG3
280
285
GH1A
GH2A
GHG1
GHG1
GH1
GHG2 GH2
GH2B
GHG2
ENGINE
BLOCK
ENGINE GRID
HEATER
HMG
EG9
GH2C
275
TSG
TS1
TEMP
SENDER
A
B
GH1B
GH1C
1
2
B A E D C B A
F E D C B A B A
ENGINE GRID
HEATER RELAY 1
1 2
3
4
MU6620
Fuel Shutoff
Solenoid used
only on SN
0160003689 &
Before. See
page 9.56
Brake Relay on early
production units.
See page 9.48.