Lull 944E-42 Service Manual - Manual (Page 580)

Electrical System
9.70 Model 644E-42/944E-42 Rev. 6/04
9.8.25 644E-42 Engine Start Circuit & Troubleshooting
Schematic is drawn with the ignition switch in the START position.
POWER
FEMALE
AND MALE
CONNECTOR
A
B
C
D
E
F NS2
ST4
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
RG6
RG9
RG3
RG4
RG5
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
12V BUSS BAR
A
B
C BA1
A
B
C
D
E
F
ST2
POWER
MALE
AND FEMALE
CONNECTOR
TR7A
PB3A
ST3
ST4A
A
FJ1
PB1
PB2B
2
5
8
ENGINE
BLOCK
+
-
BATTERY
1
STARTER
GND (-)
+ To Engine Start Relay
To Fuel Shutoff
Connector or
Splice 325
To Engine
Start Relay
EG2
GROUND BUSS BAR
ENGINE
START
RELAY
1 2
3
4
1 2
3
4
FUEL
SHUTOFF
RELAY
FR3 FRG
ST1
SRG
ST3
FUEL
SHUTOFF
SOLENOID
BLK
WHT
RED
C
B
A
ST4A
FRG FSG
FR2
95
ST2
FR2
FSG
C
B
A
To Starter
To Power
Male Connector
To
Power Male
Connector
FR1
ST1
12V BUSS BAR
GROUND BUSS BAR
ST4E
ENGINE
START
RELAY
1 2
3
4
ST1 ST2
SRG
ST4F
FSG
FSG
FS2
95
C
B
A
EG2
COLD
START
FEMALE
CONNECTOR
325
ST3A
ST3A
ST3
330
ST4A
To
Engine
Fuel
Shutoff
Valve
ST4F
To Starter
12V BUSS BAR
To
Power
Male
Connector
To
Power
Male
Connector
OPEN RELAY
POSITION
86
85 87A 87
30
8 9 10 11
INSTRUMENT
PANEL
J8
GR
OUND
J9
PO
WER
TURN SIGNAL (OPTIONAL)
J10
ENGINE PRE-HEA
T
J11
MU6710
Used Only
With Cold
Start
Option.
Refer to
page 9.57.
SN
0160003690 &
After
SN 20118 &
Before,
0160002519
thru
0160003689
Brake Relay on early
production units.
See page 9.48.