4 engine schematic (if equipped for uls), Engine schematic (if equipped for uls), Electrical system – JLG G12-55A Service Manual User Manual
Page 152: My7300
Electrical System
9-10
G10-55A, G12-55A
9.5.4
Engine Schematic (if equipped for ULS)
S30
BLK ECM GND -
BLK ECM GND -
BLK ECM GND -
BLK ECM GND -
X06
BLOCK GR
OUND
DIODE
MS20
BLK ENG GND -
BLK ENG GND -
VIO PK BRK SOL -
X19
1
2
MOLDED
1
2
BRN
TRANS SOL
Y1 -
BRN
TRANS SOL
Y2 -
X17
BRN
TRANS SOL
Y3 -
BRN
TRANS SOL
Y4 -
BRN
TRANS SOL
Y5 -
BRN
TRANS SOL
Y6 -
BLK ENG GND -
BLK ENG GND -
DBL
TRANS
TMP SW -
VIO PK BRK SOL -
1
2
3
4
5
6
7
8
9
10
11
12
S18
S21
BLK DIA
G
GND -
RED DIA
G PWR -
YEL CAN H/904 -
GRN CAN L/905 -
X22
1
2
3
4
5
6
7
8
9
DIAGNOSTIC
YEL CAN H/904 -
GRN CAN L/905 -
YEL CAN H/904 -
GRN CAN L/905 -
YEL CAN H/904 -
GRN CAN L/905 -
GRN CAN L/905 -
YEL CAN H/904 -
X28
1
2
3
4
5
6
7
8
9
10
11
12
YEL CAN H/904 -
GRN CAN L/905 -
X13
1
2
3
CANB
US
TERMINA
TING
RESIST
OR 120
WHT GRID HTR -
BLK GRID HTR R
TN -
GRID HEATER, CUMMINS
RL09-87
1
RL09-30
1
RL09-86
1
RL09-85
1
87
30
86
85
S11
RL10
ORG STR
T L.O
.
SIG -
BLK STR
T L.O
.
R
TN -
ORN ST RL
Y -
ORN STR
T L.O
.
SIG -
STARTER LOCKOUT RELAY
1
2
3
4
5
87
30
87a
85
86
ORN STRT L.O. SIG -
ORG STRT SOL -
BLK ENG GND -
RED ECM PWR -
RED ECM PWR -
RED ECM PWR -
RED ECM PWR -
RED STRT PWR -
ST
AR
TER/ECM PO
WER
RL23-B+
1
RL23-Y
1
RL23-R
1
RL23
1
2
BLK STRT GND -
ST
AR
TER, CUMMINS
X39
X40
M
ORG STRT SOL -
RED STRT PWR -
BLK STRT GND -
EC24-B+
1
EC24
1
EC24-B-
1
X02
VIO ENG WARN LT -
ORG ENG STOP LT -
WHT WAIT TO START LT -
BRN THR SUP/911 -
GRN THR SGN/915 -
YEL THR RTN/914 -
WHT GRID HTR -
ORG STRT L.O. SIG -
BLK OUTPUT RTN -
WHT KEW SW SIG
YEL CAN H/904 -
GRN CAN L/905 -
BLU THR SIG 2 -
ORG THR RTN 2 -
RED ECM PWR -
RED ECM PWR -
RED ECM PWR -
RED ECM PWR -
BLK ECM GND -
BLK ECM GND -
BLK ECM GND -
BLK ECM GND -
WHT COOLANT LEVEL -
BLK OEM SEN RTN -
VIO SEN SUP 2 -
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
WHT COOLANT LEVEL -
BLK OEM SEN R
TN -
VIO SEN SUP 2 -
X29
1
2
3
150A
RED AL
T PWR -
X38
1
+ 12V
BA
TT +
BA
TT GND
3
RED AL
T PWR -
X25
1
2
X37
1
AL
TERNA
TO
R
ENGINE ECM
TO CHASSIS
X03
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
VIO ENG
W
A
RN L
T
-
ORG ENG ST
OP L
T
-
WHT
W
A
IT
T
O
ST
AR
T L
T
-
BRN
THR SUP/911 -
GRN
THR SGN/915 -
YEL
THR R
T
N/914 -
WHT KEW SW SIG
BRN
TRANS SOL
Y1 -
BRN
TRANS SOL
Y2 -
BRN
TRANS SOL
Y3 -
BRN
TRANS SOL
Y4 -
BRN
TRANS SOL
Y5 -
BRN
TRANS SOL
Y6 -
DBL
TRANS
TMP SW -
VIO PK BRK SOL -
BLK DIA
G GND -
RED DIA
G PWR -
BLK ENG GND -
ORN ST RL
Y -
RED AL
T EXC
RED AL
T EXC -
YEL CAN H/904 -
GRN CAN L/905 -
BLU
THR SIG 2 -
ORG
THR R
T
N 2 -
VIO SEN SUP 2 -VIO SEN SUP 2 -
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