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RMCmoduleplug test(manualPTO)
1.
Disconnect the molded 8-pin plug from the RMC
module. See Figure 7.7.
,
Looking at the plug head-on, it will be configured
as shown in the diagram: There will be 8 female
pin terminals. When probed they should yield the
results described in the following sections.
See Figure 7.8.
Empty
Figure 7.8
ELECTRICAL SYSTEM
,
,
,
Top left rounded-shape: Yellow wire
Behavior: When the terminal is probed (yellow
wire), there should be continuity to ground when
the seat is empty.
Circuitry: The yellow wire leads to the seat
safety switch, where it finds a path to ground
when the seat is empty.
NOTE: The yellow wire also branches off to the
PTO switch. If the PTO is "on" and the key
switch is turned to the "off" position, the yellow
wire will get a ground through the key switch.
Interpretation: If behavior is correct, the seat
safety circuit is good. If there is continuity to
ground when the seat is occupied, the switch
may be inoperative,
the PTO is on while the key
switch is off or there may be a short to ground in
the wire leading to it. If there is not continuity to
ground when the seat is empty, the switch may
be inoperative or there may be an open condi-
tion in the wire leading to it.
Top right middle square-shape: There is a red
wire with black trace between yellow wire and
the green wire. This wire provides the module
with input from the reverse switch.
Behavior: When the tractor is in reverse, this
terminal should have continuity to ground.
Circuitry: This wire runs directly to the reverse
safety switch.
Interpretation: Continuity to ground when the
tractor is not in reverse would indicate a short to
ground. This could take the form of a chafed wire
contacting ground or a shorted reverse safety
switch.
Lack of continuity to ground would indicate:
• A broken or disconnected wire leading to
the reverse safety switch
• A switch that is not closing because of
physical damage or corrosion.
• Loss of ground to the reverse switch.
Top right rounded-shape
and the bottom right
square shape: are qreen wires.
Behavior: The green wires should always have
continuity to ground.
Circuitry:
The green wires leads to ground.
Page 9
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