Electrical system – Lull 944E-42 Service Manual User Manual
Page 588
Electrical System
9.78
Model 644E-42/944E-42
Rev. 6/04
944E-42 Engine Start Circuit & Troubleshooting (Continued)
Schematic is drawn with the ignition switch in the START position.
OPEN RELAY
POSITION
86
85 87A 87
30
BPD
BPM
BNW
BPS
BNP
BNH
BNF
BNE
BPC
BPB
ST4A
A
B
C
D
E
F
H
M
P
S
W
P1
ENGINE CONTROL
MODULE FEMALE
CONNECTOR
1
2
3
4
ENGINE GRID
HEATER RELAY 2
ENGINE GRID
HEATER RELAY 1
1
2
3
4
GH2A
GROUND BUSS BAR
12V BUSS BAR
A
B
C
BA1
ST2
ST1
ENGINE
BLOCK
AB1
AB2
AG1
AG2
AG1
ALTERNATOR
7
GHG
GHG3
GH1B
GH1
GHG1
GHG1
GH3
THS
THP
THG
GHG2
GH3
GH4
PH1A
GH4
GH2B
P11
DIODE PACK
F
E
B
A
GHG3
125
Amp
Fuse
125
Amp
Fuse
PH1A
P10
DIODE PACK
A
B
C
F
AG2
GHG
GH2A
GH1A
P2
ENGINE
CONTROL
MODULE
FEMALE
CONNECTOR
GH2
GH1
THS
THP
THG
GH2
BPS
BPL1
BPL2
BPS1
BPM
BPM1
A
B
C
D
E
F
10
10
10
BPD1
BPC
BPD
BPC1
BPB
BPB1
A
B
C
D
E
F
7.5
7.5
7.5
BN
BPL1
P6
ENGINE CONTROL
MODULE FUSES
P5
ENGINE CONTROL
MODULE FUSES
ENGINE CONTROL
MODULE POWER
MALE AND FEMALE
CONNECTOR
PH1
ENGINE
BLOCK
ENGINE GRID
HEATER
1
2
THROTTLE
ROTARY
POSITION
SENSOR
2
3
1
THS1
THP1
THG1
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
POWER
MALE
AND FEMALE
CONNECTOR
TR7A
PB3A
A
FJ1
PB1
PB2B
2
5
8
PH
SENSOR
FEMALE AND MALE
CONNECTOR
PH
PH1
9
8
GH1A
ENGINE
START
RELAY
1
2
3
4
ST1
ST2
SRG
ST3
SRG
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
A
B
C
A
B
C
D
E
F
ST4A
ST3
POWER
FEMALE
AND MALE
CONNECTOR
A
B
C
D
E
F
NS2
ST4
BPD1
BPM1
BPC1
BPS1
BPB1
BPL2
BN
BNE
BNP
BNF
BNH
BNW
P7
DIAGNOSTIC
PLUG
A
B
STARTER
GND (-)
+
19
20
25
26
29
30
31
35
36
37
41
BA
TTER
Y
2
+
-
BA
TTER
Y
1
+
-
B+
D+
GND (-)
W
FRAME
GROUND
MU5621
Brake Relay on early
production units.
See page 9.48.