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Chapter 2 Tow Tractor Model MA-28Section 5 Maintenance Manual
CD444-28M 2 - 5 -3May 2019 (Rev A)
5.1ElectricalSchematics
Figure2-5-1:MA-28StandardElectricalSchematicWRG-MA-STD-28-103_RevA(Page1of4)
REFERENCEPAGE 2
WH
TG
RN
15 3
CODEENGINE
SWTICH
31 14 2533
FORD POWER PRODUCTS 42 PIN INTERFACE CONNECTOR
(PN
K/BL
U) P
1-3
BLU
19
20
21
16
18
17
12
5
4
10
113
2
1
158
9
137
6
14
38
37
36
35
30
28
2924
23
3422
41
42
40
39
3326
27
3125
32
42 PIN IN-LINEFORD POWER PRODUCTS
MAIN HARNESS CONNECTOR
CB130A
3D
80
12 VOLTBATTERY
SWITCH
NEUTRALSAFETY
90
93
M
1
2
3
STARTER MOTORAND BENDIX
90
BLK
VALIDATION SWITCHFOOT THROTTLE &
7 6
9
8
10
BRN
/WH
T
BLK/
ORG
GRY
/RED
(GRY
/RED
) FT9
(LT
BLU
/BLK
)FT1
4
(BLK
/ORG
) FT2
5
BRN/WHT
LT BLU/BLK
GRY/RED
BLK/ORG
LT B
LU/B
LK
9011
7
G
(BRN
/WH
T) F
T31
B
CODEENGINE
LIGHT
6
(PN
K/LT
GRN
) P1-
6 RE
D
(PN
K/BL
K) P
1-5
ELECTRICPUMPFUEL
MOTOR
5
G
BLK
BLK
M
(WH
T/PU
R) P
1-18
18
RED
/TA
N
REFERENCEPAGE 2
REFERENCE FORD 2.5LDWG: 1782000
BATT+
LT B
LU/P
NK
RELAY
8586
87A30
87
LT BLU/PNK
WH
T/PN
K
LT G
RN/P
UR
RED
/LT
GRN
STARTERFORD
REFERENCE FORD 2.5LDWG: 1782000
REFERENCE FORD 2.5LDWG: 1782000
REFERENCE FORD 2.5LDWG: 1782000
90
1
(RED
/LT
GRN
) P1-
1
ALTERNATOREDI
13 2
RED
REFERENCE FORD 2.5LDWG: 1782000
SWITCHIGNITION
6
2
1
5
3 4
POWERSTUD
B
P19
P19
P19(D27)
MASTERRELAY
87
30
86
85
ENGINE
REFERENCEPAGE 3
REFERENCEPAGE 3
TCU-11
TCU-10
BLK
CHKTRANSLIGHT
BLK
(AMBER)
P1
G9
FT
TCU
-11
TCU
-8
TCU-11
TCU-10
(D22)
(D18)
REFERENCEPAGE 3
REFERENCEPAGE 3
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2 - 5 -4 CD444-28MMay 2019 (Rev A)
Tow Tractor Model MA-28 Chapter 2Maintenance Manual Section 5
Figure2-5-2:MA-28StandardElectricalSchematicWRG-MA-STD-28-103_RevA(Page2of4)
REFERENCEPAGE 1
CB320A
CB220A90 90
HORNSWITCHHORN
HORNRELAY
85
86
102
103
104
102
RED WHT
RED
WHTBL
K
RED
RIGHT FRONTHEAD LT
WHT
LEFT FRONTHEAD LT
HEAD LTSWITCH
PSWITCH
BRAKE LTPRESSURE
BRAKE/TAIL LIGHTRIGHT REAR
WHT
BLK
RED
BRAKE/TAIL LIGHTLEFT REAR
84
54
53
71
106
107
78
77
101- +
SHIFTERLIGHT
89
100 10
2
G
87
30
REFERENCEPAGE 1
RED
95
REFERENCEPAGE 490
4
2
1
3
(OPTION)
30
30
30
83
P24
P24
P24
D5
D3
D5
D3
P1
P4
P1
P4
P1
P4
GAUGEHOURMETER
CP5
CP5
(D20)
(D1) (D2)
(D10)(D25)
CP5
1
2
3
1
1
2
2
3
3
1
1
2
2
4
3
7
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Chapter 2 Tow Tractor Model MA-28Section 5 Maintenance Manual
CD444-28M 2 - 5 -5May 2019 (Rev A)
Figure2-5-3:MA-28StandardElectricalSchematicWRG-MA-STD-28-103_RevA(Page3of4)
REFERENCEREFERENCEPAGE 1
REFERENCEREFERENCEPAGE 1
BAC5
2928
FORD 42 PIN INTERFACE CONNECTOR
ENGINE CAN BUS FOR DIAGNOSTIC CONNECTOR
C-1
C-2
C-3
C4
12 10 1 7 11
BLK RE
D
WH
T/BL
K
WH
T/RE
D
YEL
TCM-2600 TRANSMISSION CONTROL TCU CONNECTOR
CA
N H
I +
CAN
LO
W -
SHIE
LD G
ND
4L70 TRANSMISSION CONNECTOR
OUTPUT SHAFT SPEED SENSOR
LAPTOP CALIBRATION CONNECTION
TWIS
TED
PA
IR
PNK/
LT.
GRN
(CH
KTRN
S)
TCU
-8
8
G9
TCU
-11
TCU-10
120 OHM RESISTOR (5%,2 W)
SP 22
SP 23
G9
(CA
N1L
)TC
U-1 (C
AN
1H)
TCU
-7
CAN
1L
CAN
1H
TRANSMISSION HARNESS TCM-4635
(CAN1H) TCU-7
(CAN1L) TCU-1
CAN
1H
CAN
1L
TWISTED PAIR
G9 R5
C
CANHI CANLOW
FH-3 FUSE 15 AMP
P1
TCU-11
TCU-10
FH-10 FUSE 15 AMP
TCU-11
TCU-11REFERENCEPAGE 1
TCU-8
(CA
N1H
) TC
U-7
(CA
N1L
) TC
U-1
REFERENCEPAGE 1
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2 - 5 -6 CD444-28MMay 2019 (Rev A)
Tow Tractor Model MA-28 Chapter 2Maintenance Manual Section 5
Figure2-5-4:MA-28StandardElectricalSchematicWRG-MA-STD-28-103_RevA(Page4of4)
CB420A
RED
FRONTWIPERMOTOR
FRONTWIPER
SWITCH
66
RED
ORG
62L
62
HL MC
B
CABHEATERMOTOR
HL M
M
M63C
65
HEATERSWITCH
68
SWITCH
DOMELIGHT
DOMELIGHT
FLASHING BEACON LIGHT
FLASHER
LIGHT
REFERENCEPAGE 2 90
D7D7
IOPTIONAL CAB WIRING
(D17)
68
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