Fisher HT Series - Lower;Float Function: Electrical Operation; Lower;Float System Electrical Response

Lit. No. 41298, Rev. 01 February 15, 2019
45
LOWER / FLOAT – ELECTRICAL
System Response
1. By activating the LOWER function on the cab
control, the control sends a signal to the Plow
Module to complete the ground path for the
electrical circuit, activating solenoid cartridge
valve S1.
2. With the weight of the snowplow on the rod
end of the lift ram and S1 cartridge valve
shifted, the lift ram extends. Hydraulic fl uid is
pushed out of the rod end, through activated
S1, unactivated S2 and S3, and back to the
reservoir. At the same time, hydraulic fl uid is
being drawn through CV2 into the base end of
the ram from the reservoir.
NOTE: When activating FLOAT mode, the S1
cartridge stays open until the RAISE function
is activated
NOTE: Battery voltage is supplied to the Plow
Module, the motor relay, and the three solenoid
coils when the snowplow is connected to the
vehicle.
RED
Plow Module
4A Fuse: Motor
Relay
4A Fuse: S1, S2, S3
Pump
Motor
Motor
Relay
GG
A
A
A
B
C
E
D
F
B
C
D
E
F
H
KK
H
JJ
A
B
A
GG
B
D
C
F
E
D
B
C
F
E
H
KK
H
JJ
Wire Side View
10-Pin Connector
C
WHT
TAN
BLK
RED
RED
RED
S1
S2
S3
BLK
RED
RED
WHT
GRN
BLU
RED
12V
COM
12V
M/R
S2
S3
S1
12V
E
D
B
C
A
F
G
J
H
K
+
–
BLK