Loader Bobcat 853, 853H. Manual — part 45
MC2566 (5-25-99)
853 BOSS - WIRING SCHEMATIC
S/N 508411354-11714
S/N 509711001-11094
(Printed June 1999)
MC2566
A
B
BL
K
R
N
G
BLK
BLK
DGN/RED
C
41
4
C
41
5
C407
C408
BL
K
RNG
CONTROLS MODULE
FRONT AUXILIARY
ROD SOLENOID
FRONT AUXILIARY
BASE SOLENOID
D
G
N
R
N
G
R
N
G
LG
N
/D
BL
LG
N
/PN
K
LG
N
/R
ED
D
G
N
/YEL
LG
N
/PN
K
LG
N
/R
ED
LG
N
/D
BL
R
N
G
B
A
B
A
B
A
B
A
C
41
1
C
41
0
BLK
BLK
B
A
A
B
REAR AUXILIARY
ROD SOLENOID
REAR AUXILIARY
BASE SOLENOID
YEL/WHT
YEL
DGN/LGN
RNG
DGN/RED
DGN
D
G
N
/R
ED
DGN/WHT
C
B
CONTROLS HARNESS -
6703005
R
N
G
RNG
B
A
RNG/DBL
B
A
RNG
YEL/WHT
C
YEL
A
HORN
K
E D F
A B J H G C
C
G
H
J
A
F
D
E
K
B
B A D F E C
B A D F E C
C
G
F
D
E
K J
H
A
B
A
B
DIODE
A
B
BLK
RED
RED
BLK
A
B
C
42
0
DIODE HARNESS - 6703898
DIODE HARNESS - 6703898
B
A
BLK
RED
RED
BLK
B
A
DIODE
B
A
C
42
1
FRONT
AUX.
DETENT
RIGHT HANDLE
(IF EQUIPPED)
YEL
BRN
RNG/WHT
B
A
RNG/DBL
DGN
B
C
A
LEFT HANDLE
(IF EQUIPPED)
A
C
B
DGN
RNG/DBL
A
B
HORN
RNG/WHT
BRN
YEL
REAR
AUX.
C
40
1
C
40
2
C
40
3
C
40
4
C
11
4
2
1
PUR/WHT
RNG
DBL/WHT
BLK
RED/WHT
IGNITION SWITCH
B
I
SO
RED/WHT
C
20
4
TO OPTIONS
(FRONT WIPER)
FLASHER
BRN
BLK
PUR/RED
BOSS DISPLAY
4
3
2
1
D
E
A
C
B
PUR/RED
PUR/WHT
RNG
BLK
PUR/RED
PUR/WHT
BLK
DIAGNOSTIC PORT
DGN/WHT
DGN/WHT
C119
BR
N
BR
N
D
BL
BLK
WHT
RNG
RED/WHT
BLK
RNG
RNG
ST
BR
N
LCD DISPLAY MONITOR
BLK
WHT
DBL/WHT
PNK
PUR/WHT
PUR/RED
RNG
RNG
BLK
RNG
B
LK
B
LK
R
N
G
R
N
G
P
U
R
/R
ED
P
U
R
/W
H
T
W
H
T/
R
N
G
R
N
G
/W
H
T
R
N
G
/W
H
T
Y
EL
/R
ED
B
LK
B
LK
PU
R
/R
ED
YEL
/L
BL
B
LK
B
LK
P
U
R
B
LK
YEL
/L
BL
B
LK
Y
EL
/BR
N
B
LK
Y
EL
/D
BL
D
BL
/Y
EL
HR
A
STARTER RELAY
SHUTDOWN RELAY
WIRES CONNECT BY
LETTER ACROSS
CONNECTORS
A
B A
B
WHT/LGN
GLOW PLUG RELAY
M
S
B
STARTER
BATTERY
RED
RED
G
RED
S
ALTERNATOR
B
RED
RED
87
87A
30
86
85
BLK
DBL/WHT
PNK
BLK
85
87
87A
LBL/RNG
RED
BLK
RED
86
30
85
WHT
WHT/LGN
87
87A
SOME CONNECTOR
BODIES NOT SHOWN
FOR DRAWING CLARITY
BLK
RNG
h
BL
K
C121
R
N
G
GLOW
PLUGS
BOSS
FUEL SHUTOFF
SOLENOID
LGN
C118
LGN/WHT
PUR
EXC
RED
Y
EL
/D
G
N
R
N
G
/D
BL
86
30
AUXILIARY
HOURMETER AND
HARNESS (IF EQUIPPED)
ENGINE RPM
(MAGNETIC PICKUP)
#
H
2
* * *
G
1
C
3
PIN NUMBER = 30 PIN CONNECTOR
*
C
3
* * *
C
2
D
3
C
1
#
# # # # #
C
2
A
2
A
3
B
1
B
2
B
3
* * * *
F
3
E
1
B
2
B
1
# # # #
C
1
D
3
D
2
#
E
3
* * * * * * * *
D
1
D
2
E
2
E
3
H
1
H
3
B
3
A
1
#
PIN NUMBER = 18 PIN CONNECTOR
* * * * *
* *
F
2
G
2
G
3
J
1
J
3
J
2
K
1
#
# #
F
3
E
2
F
2
*
*
* *
F
1
K
2
A
3
A
2
# #
#
F
1
E
1
A
1
BACKUP
ALARM
A
BL
K
BL
K
P
N
K
P
N
K
BL
K
D
B
L/
W
H
T
BLK
BL
K
DBL/WHT
RNG/DGN
PNK
RNG
LEFT
TAILLIGHT
RIGHT
TAILLIGHT
LGN/RED
RED
LGN/PNK
RNG
DGN/YEL
LGN/DBL
AUXILIARY HYDRAULIC SWITCH
(IF EQUIPPED)
D
C
E
F
B
A
E
B
A
RED
C
D
F
LBL/BLK
RED
LG
N
/D
B
L
D
G
N
/YEL
R
N
G
LG
N
/PN
K
LG
N
/R
E
D
P
U
R
/L
BL
B
LK
D
1
LBL
/W
H
T
R
ED
RED
REAR LIGHT HARNESS - 6577648
B
C
LEFT
WORK
LIGHT
RIGHT
WORK
LIGHT
B
C
WHT/BLK
BLK
RNG
RED/WHT
C110
ACC
OFF
RUN
START
B
LK
D
BL
BR
N
LEFT
HEADLIGHT
(IF
EQUIPPED)
RIGHT
HEADLIGHT
(IF
EQUIPPED)
LEFT
FLASHER
LAMP
(IF
EQUIPPED)
RIGHT
FLASHER
LAMP
(IF
EQUIPPED)
DETENT LIGHT
MODE LIGHT
BL
K
BL
K
HYDRAULIC
CHARGE
PRESSURE
R
N
G
BL
K
LBL/BLK
*
D
1
RED/WHT
ENGINE HARNESS (BOSS) - 6702898
DIODE
R
ED
/W
H
T
AC
C
ES
SO
R
Y
FU
SE
R
ED
/W
H
T
EN
G
IN
E
FU
SE
RED/WHT
CAB HARNESS (BOSS) - 6702610
C
11
5
C
20
1
RETURN FILTER
PRESSURE
HYDRAULIC
OIL
PRESSURE
PRE-FILTER
PRESSURE
HYDRAULIC
OIL
TEMPERATURE
COOLANT
LEVEL
AIR
FILTER
ENGINE OIL
PRESSURE
FUEL
LEVEL
ENGINE
COOLANT
LIGHT SWITCH
(IF EQUIPPED)
B1
B2
WARNING
HEADLIGHT
REAR WORK
TAIL
RED/WHT
PNK
RESISTOR
5 OHM
C
10
6
C122
C120
C
11
6
C
20
3
C
21
6
C
10
7
RED
B
A
A B
B A
B A
B
C A
G J F K D H E
RNG
TO OPTIONS
C
10
5
TO OPTIONS
RED/WHT
C
10
8
RED/WHT
GRY = GREY
WHT = WHITE
PUR = PURPLE
TAN = TAN
BRN = BROWN
PNK = PINK
YEL = YELLOW
DGN = DARK GREEN
LGN = LIGHT GREEN
DBL = DARK BLUE
LBL = LIGHT BLUE
BLK = BLACK
RNG = ORANGE
RED = RED
A
A
B
B
D
G
N
/R
ED
D
G
N
R
N
G
BL
K
LG
N
/PN
K
D
G
N
/YE
L
R
N
G
LG
N
/D
BL
RNG/DBL
RNG
YEL/WHT
YEL
RNG
BLK
BLK
DGN/RED
DGN/LGN
CONTROLS MODULE
DGN/RED
B
C
CONTROLS HARNESS - 6703878
C
41
4
C
41
5
C407
C408
R
N
G
BL
K
A
R
N
G
B
A
RNG
R
N
G
B
FRONT AUXILIARY
ROD SOLENOID
FRONT AUXILIARY
BASE SOLENOID
LG
N
/R
E
D
LG
N
/D
B
L
LG
N
/PN
K
LG
N
/R
ED
B
A
B
A
B
A
REAR AUXILIARY
BASE SOLENOID
REAR AUXILIARY
ROD SOLENOID
C
41
1
C
41
0
YEL/WHT
YEL
BLK
BLK
B
A
A
B
A
B
A
B
C
A
RNG
DGN/LGN
DGN
853 BOSS - WIRING SCHEMATIC
MC2572 (5-25-99)
S/N 508411715-12360
S/N 509711095-11308
(Printed June 1999)
MC2572
HORN
J
A B G
K H C D E F
A B G J K H C D E F
A C E F B D
F
A C E
B D
C
G
K
E
B
D H
J
A
F
FRONT
AUX.
DETENT
RIGHT HANDLE
(IF EQUIPPED)
YEL
BRN
RNG/WHT
B
A
RNG/DBL
DGN
B
C
A
LEFT HANDLE
(IF EQUIPPED)
A
C
B
DGN
RNG/DBL
A
B
HORN
RNG/WHT
BRN
YEL
REAR
AUX.
C
40
1
C
40
2
C
40
3
C
40
4
C
11
4
2
1
PUR/WHT
RNG
DBL/WHT
BLK
RED/WHT
IGNITION SWITCH
B
I
SO
RED/WHT
C
20
4
TO OPTIONS
(FRONT WIPER)
FLASHER
BRN
BLK
PUR/RED
BOSS DISPLAY
4
3
2
1
D
E
A
C
B
PUR/RED
PUR/WHT
RNG
BLK
PUR/RED
PUR/WHT
BLK
DIAGNOSTIC PORT
DGN/WHT
DGN/WHT
C119
BR
N
BR
N
D
BL
BLK
WHT
RNG
RED/WHT
BLK
RNG
RNG
ST
BR
N
LCD DISPLAY MONITOR
BLK
WHT
DBL/WHT
PNK
PUR/WHT
PUR/RED
RNG
RNG
BLK
RNG
B
LK
B
LK
R
N
G
R
N
G
PU
R
/R
ED
P
U
R
/W
H
T
W
H
T/
R
N
G
R
N
G
/W
H
T
R
N
G
/W
H
T
Y
EL
/R
ED
BL
K
BL
K
PU
R
/R
ED
Y
EL
/L
BL
B
LK
B
LK
P
U
R
B
LK
Y
EL
/L
BL
B
LK
Y
EL
/BR
N
B
LK
Y
EL
/D
BL
D
BL
/Y
EL
HR
A
STARTER RELAY
SHUTDOWN RELAY
WIRES CONNECT BY
LETTER ACROSS
CONNECTORS
A
B A
B
WHT/LGN
GLOW PLUG RELAY
M
S
B
STARTER
BATTERY
RED
RED
G
RED
S
ALTERNATOR
B
RED
RED
87
87A
30
86
85
BLK
DBL/WHT
PNK
BLK
85
87
87A
LBL/RNG
RED
BLK
RED
86
30
85
WHT
WHT/LGN
87
87A
SOME CONNECTOR
BODIES NOT SHOWN
FOR DRAWING CLARITY
BLK
RNG
h
BL
K
C121
R
N
G
GLOW
PLUGS
BOSS
FUEL SHUTOFF
SOLENOID
LGN
C118
LGN/WHT
PUR
EXC
RED
YE
L/
D
G
N
R
N
G
/D
BL
86
30
AUXILIARY
HOURMETER AND
HARNESS (IF EQUIPPED)
ENGINE RPM
(MAGNETIC PICKUP)
#
H
2
* * *
G
1
C
3
PIN NUMBER = 30 PIN CONNECTOR
*
C
3
* * *
C
2
D
3
C
1
#
# # # # #
C
2
A
2
A
3
B
1
B
2
B
3
* * * *
F
3
E
1
B
2
B
1
# # # #
C
1
D
3
D
2
#
E
3
* * * * * * * *
D
1
D
2
E
2
E
3
H
1
H
3
B
3
A
1
#
PIN NUMBER = 18 PIN CONNECTOR
* * * * *
* *
F
2
G
2
G
3
J
1
J
3
J
2
K
1
#
# #
F
3
E
2
F
2
*
*
* *
F
1
K
2
A
3
A
2
# #
#
F
1
E
1
A
1
BACKUP
ALARM
A
BL
K
BL
K
P
N
K
P
N
K
BL
K
D
B
L/
W
H
T
BLK
BL
K
DBL/WHT
RNG/DGN
PNK
RNG
LEFT
TAILLIGHT
RIGHT
TAILLIGHT
LGN/RED
RED
LGN/PNK
RNG
DGN/YEL
LGN/DBL
AUXILIARY HYDRAULIC SWITCH
(IF EQUIPPED)
D
C
E
F
B
A
E
B
A
RED
C
D
F
LBL/BLK
RED
LG
N
/D
B
L
D
G
N
/YEL
R
N
G
LG
N
/PN
K
LG
N
/R
E
D
P
U
R
/L
BL
B
LK
D
1
LBL
/W
H
T
R
ED
RED
REAR LIGHT HARNESS - 6577648
B
C
LEFT
WORK
LIGHT
RIGHT
WORK
LIGHT
B
C
WHT/BLK
BLK
RNG
RED/WHT
C110
ACC
OFF
RUN
START
B
LK
D
BL
BR
N
LEFT
HEADLIGHT
(IF
EQUIPPED)
RIGHT
HEADLIGHT
(IF
EQUIPPED)
LEFT
FLASHER
LAMP
(IF
EQUIPPED)
RIGHT
FLASHER
LAMP
(IF
EQUIPPED)
DETENT LIGHT
MODE LIGHT
BL
K
BL
K
HYDRAULIC
CHARGE
PRESSURE
R
N
G
B
LK
LBL/BLK
*
D
1
RED/WHT
ENGINE HARNESS (BOSS) - 6702898
DIODE
R
ED
/W
H
T
AC
C
ES
SO
R
Y
FU
SE
R
ED
/W
H
T
EN
G
IN
E
FU
SE
RED/WHT
CAB HARNESS (BOSS) - 6702610
C
11
5
C
20
1
RETURN FILTER
PRESSURE
HYDRAULIC
OIL
PRESSURE
PRE-FILTER
PRESSURE
HYDRAULIC
OIL
TEMPERATURE
COOLANT
LEVEL
AIR
FILTER
ENGINE OIL
PRESSURE
FUEL
LEVEL
ENGINE
COOLANT
LIGHT SWITCH
(IF EQUIPPED)
B1
B2
WARNING
HEADLIGHT
REAR WORK
TAIL
RED/WHT
PNK
RESISTOR
5 OHM
C
10
6
C122
C120
C
11
6
C
20
3
C
21
6
C
10
7
RED
B
A
A B
B A
B A
B
C A
G J F K D H E
RNG
TO OPTIONS
C
10
5
TO OPTIONS
RED/WHT
C
10
8
RED/WHT
GRY = GREY
WHT = WHITE
PUR = PURPLE
TAN = TAN
BRN = BROWN
PNK = PINK
YEL = YELLOW
DGN = DARK GREEN
LGN = LIGHT GREEN
DBL = DARK BLUE
LBL = LIGHT BLUE
BLK = BLACK
RNG = ORANGE
RED = RED
C
11
4
C
12
4
MC2567 (5-25-99)
S/N 508412361-12460
S/N 509711309-11334
(Printed June 1999)
MC2567
853 BOSS - WIRING SCHEMATIC
START
RUN
OFF
ACC
2
1
PUR/WHT
RNG
RNG
DBL/WHT
RNG
WHT
BLK
RED/WHT
IGNITION SWITCH
B
I
ST
SO
BLK
PUR/RED
RED/WHT
C
20
4
BLK
TO OPTIONS
(FRONT WIPER)
CAB HARNESS (BOSS) - 6704407
FLASHER
BR
N
BRN
BR
N
LEFT
FLASHER
LAMP
(IF
EQUIPPED)
BOSS DISPLAY
4
3
2
1
D
E
A
C
B
PUR/RED
PUR/WHT
RNG
BLK
RED
PUR/RED
PUR/WHT
BLK
DIAGNOSTIC PORT
C
20
1
C
21
6
DGN/WHT
DGN/WHT
C119
D
BL
LEFT
HEADLIGHT
(IF
EQUIPPED)
BLK
RED/WHT
PNK
RNG
BR
N
LCD DISPLAY MONITOR
LGN/RED
RED
LGN/PNK
RNG
DGN/YEL
LGN/DBL
DETENT LIGHT
MODE LIGHT
AUXILIARY HYDRAULIC SWITCH
(IF EQUIPPED)
D
C
E
F
B
A
C110
BL
K
D
BL
BR
N
RIGHT
HEADLIGHT
(IF
EQUIPPED)
RIGHT
FLASHER
LAMP
(IF
EQUIPPED)
RED/WHT
RNG/DBL
RNG/DBL
BLK
HORN
TO ENGINE
C
11
6
C
11
5
C120
LIGHT SWITCH
(IF EQUIPPED)
B1
B2
WARNING
HEADLIGHT
REAR WORK
TAIL
RED/WHT
C
20
3
A
A
B
BL
K
R
N
G
BLK
BLK
DGN/RED
DGN/LGN
B
C
C407
C408
RNG/DBL
BL
K
RNG
B
A
CONTROLS MODULE
FRONT AUXILIARY
ROD SOLENOID
FRONT AUXILIARY
BASE SOLENOID
R
N
G
D
G
N
B
RNG
YEL/WHT
YEL
R
N
G
R
N
G
LG
N
/D
BL
LG
N
/PN
K
LG
N
/R
ED
D
G
N
/YEL
LG
N
/PN
K
LG
N
/R
E
D
LG
N
/D
B
L
R
N
G
B
A
B
A
B
A
B
A
C
41
0
BLK
BLK
B
A
A
B
A
B
A
B
REAR AUXILIARY
ROD SOLENOID
REAR AUXILIARY
BASE SOLENOID
YEL/WHT
YEL
C
DGN/LGN
A
RNG
DGN/RED
RNG
DGN
D
G
N
/R
ED
CONTROLS HARNESS - 6703878
HORN
C
41
4
C
41
5
C
41
1
A B G J K H C D E F
A B G J K H C D E F
F
A C E
B D
F
A C E
B D
C
G
A
D H
J K
E F B
FRONT
AUX.
DETENT
RIGHT HANDLE
(IF EQUIPPED)
YEL
BRN
RNG/WHT
B
A
RNG/DBL
DGN
B
C
A
LEFT HANDLE
(IF EQUIPPED)
A
C
B
DGN
RNG/DBL
A
B
HORN
RNG/WHT
BRN
YEL
REAR
AUX.
C
40
1
C
40
2
C
40
3
C
40
4
BLK
WHT
DBL/WHT
PNK
PUR/WHT
PUR/RED
RNG
RNG
BLK
RNG
BL
K
BL
K
R
N
G
R
N
G
PU
R
/R
E
D
PU
R
/W
H
T
W
H
T/
R
N
G
R
N
G
/W
H
T
R
N
G
/W
H
T
YEL
/R
ED
BL
K
BL
K
PU
R
/R
ED
YEL
/L
BL
BL
K
BL
K
PU
R
BL
K
YEL
/L
BL
BL
K
YEL
/BR
N
BL
K
YEL
/D
BL
D
BL
/YEL
HR
A
STARTER RELAY
SHUTDOWN RELAY
WIRES CONNECT BY
LETTER ACROSS
CONNECTORS
A
B A
B
WHT/LGN
GLOW PLUG RELAY
M
S
B
STARTER
BATTERY
RED
RED
G
RED
S
ALTERNATOR
B
RED
RED
87
87A
30
86
85
BLK
DBL/WHT
PNK
BLK
85
87
87A
LBL/RNG
RED
BLK
RED
86
30
85
WHT
WHT/LGN
87
87A
SOME CONNECTOR
BODIES NOT SHOWN
FOR DRAWING CLARITY
BLK
RNG
h
BL
K
C121
R
N
G
GLOW
PLUGS
BOSS
FUEL SHUTOFF
SOLENOID
LGN
C118
LGN/WHT
PUR
EXC
RED
YEL
/D
G
N
R
N
G
/D
BL
86
30
AUXILIARY
HOURMETER AND
HARNESS (IF EQUIPPED)
ENGINE RPM
(MAGNETIC PICKUP)
#
H
2
* * *
G
1
C
3
PIN NUMBER = 30 PIN CONNECTOR
*
C
3
* * *
C
2
D
3
C
1
#
# # # # #
C
2
A
2
A
3
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