60
SS300 Service Information (3-2017)
TROUBLESHOOTING
SCRUB MOTOR ON
From Key
Swit
ch B+
J7-6 Interface
Module
D-1
M1B
30
87
(2) 12 VDC Batteries
1/RED
1/RED
12/BRN
26/BLU
13/BLK
13/BLK
6/BLU
20/TAN
6/BLU
42/BRN
6/BL
U
13/BLK
13/BLK
+
-
+
-
12 Volt
12 Volt
Battery Po
Battery Negative -
PMC021
CB5 (37A)
Scrub
Motor
MTR
M1A
86
85
Auxiliary Scrub
Brush Relay
NOTE: The scrub motor system
uses two relays (stepped) because
the M4A coil exceeds the max.
current rating of the J7-6 output
circuit.
Auxiliary Scrub
Brush Relay
M4B
30
87
Scrub Brush Relay
M4A
86
85
Scrub
Brush Relay
Scrub
Motor
Enabled
• Head Lowered -
Foot Pedal
• Fwd/Rev Throttle
Command or Bail
Activated on non-
Propel models.
Disabled
Operational Matrix:
• Head Raised - Foot Pedal
• Neutral - Ready State or Bail
released on non-propel
models.
• Low Battery Voltage
• Fault
• Battery Charger ON Interlock
