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Lit. No. 28270, Rev. 00
July 1, 2005
54
LEFT RETRACT – ELECTRICAL
RED
A
C
B
E
G
F
H
J
K
D
TO SWITCHED ACCESSORY LEAD
12V BA
TTER
Y
#6 BLK
BRN/RED
BRN/GRN
#6 RED
PLOW ASSEMBLY
LOCATED NEAR BATTERY
MTR RLY
#6 RED
LOCATED AT FRONT OF VEHICLE
LT BLU
LT GRN
WHT/YEL
LT BLU
LT GRN
WHT/YEL
#6 BLK
#6 RED
From Vehicle
Control Harness
1
1
3
5
4
7
6
8
9
10
11
2
1
3
5
4
7
6
8
9
10
11
2
1
2
1
2
LT BLU/ORN
BLU/ORN
RED
BLK/WHT
S1 SOLENOID
S2 SOLENOID
RED
PUMP MOTOR
#6 BLK
#6 BLK/RED
-
+
M
S3 SOLENOID
S4 SOLENOID
S5 SOLENOID
S6 SOLENOID
RED
BLK/WHT
BLU/ORN
LT BLU/ORN
HAND-HELD
CONTROL
COIL CORD HARNESS
6
7
5
4
WHT
BLK
GRN
ORN
2
3
1
YEL
BLU
RED
6
4
3
5
2
1
3
4
6
5
7
2
1
7
8
9
10
11
12
13
14
8
9
10
11
8
9
10
11
VIO
GRY
TAN
BRN
LOCATED UNDER DASH
6
4
3
5
2
1
7
8
9
10
11
12
13
14
BLK/ORN
BRN/GRN
LT BLU/ORN
BLU/ORN
BLK/WHT
LT GRN
LT BLU
WHT/YEL
BRN/RED
10-AMP CONTROL FUSE
BLK/ORN
TO PIN 2 OF VEHICLE
LIGHTING HARNESS
ISOLATION MODULE
RED/WHT
RED/YEL
RED/YEL
RED/GRN
BLK/ORN
RED/YEL
TO PLOW P/T BULB GROUND
F1
F2
System Response
1. By pressing the control button,
the circuit board inside the cab
control completes the ground
path for the electrical circuit.
2. Electrical current flows through the
motor relay, activating the pump
motor, and solenoid cartridge
valve S2, shifting its spool.
3. Hydraulic fluid from the pump
flows through solenoid cartridge
valves S2 & S3, P/O check
valve (A), and into the rod end
of the left ram causing it to
retract.
4. Pressure within the hydraulic
circuit causes P/O check valves
(B) & (C) to open.
5. The retracting left ram pushes
the hydraulic fluid out of its base
end, through solenoid cartridge
valves S4 & S5, through P/O
check valve (C) and back to the
reservoir.