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SS300 Service Information (3-2017)
TROUBLESHOOTING
SUN-I/O CIRCUIT BOARD TESTING (UNIVERSAL SCHEMATIC)
MTR
[fill in the blank] Module
(2) 12 VDC Batteries
Unswitched B+
P1-X Switched B+
B-
Input P1-X
Input P1-X
Input
Circuit Breaker
Key Switch
+
-
+
-
12 Volt
12 Volt
Directional Switch
(closed = reverse)
Motor
Battery Po
Battery Negative -
PMC021
0 V P3-X
WIPER P3-X
5 V P3-X
5K Ω Throttle
Potentiometer
P2-X Output
P2-X Output
Light
NOTE: The “P1-X” or sometimes “J1-X” format
refers to the plug or connector number followed
by the pin number within that connector. For
example, P1-4 means plug number 1, pin number 4.
Use this information to locate and identify proper
wires per the actual electrical schematic.
P2-X Output
P2-X Output
S
S
= Switched (+)
U
= Unswitched (+)
N
= Negative (-)
I
= Inputs
O
= Outputs
U
N
I
I
I
I
O
O
O
O
