Cub Cadet 1000 SERIES Service Manual page 80

Series 1000 and 1500
38.13. 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 38.13.
Figure 38.13
NOTE: You will see a difference in the configura-
tion of the adaptor of the manual PTO vs. the
Electric PTO.
38.14. Top left middle -shape: Yellow wire with Black
trace:
• Behavior: Should show DC power with the key
on.
• Circuitry: The yellow wire with black leads
directly to the PTO switch.
38.15. Check the PTO and seat safety circuits with the
8-pin pigtail connector unplugged, then recon-
nect it and continue with the RMC plug test.
• Behavior: When the female pin terminal leading
into the main harness is probed (yellow wire),
there should be continuity to ground only when
the seat is empty.
• Circuitry: The yellow wire with white trace leads
to the forward terminal on the seat safety switch,
where it finds a path to ground when the seat is
empty.
• 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, or
there may be a short to ground in the wire lead-
ing 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 condition in the wire
leading to it.
• Circuitry: The yellow wire with black trace leads
to the PTO switch, where it finds a path to
ground when the PTO is ON.
• Interpretation: If behavior is correct, the N.C.
side of the PTO switch /circuit is functioning
properly.
If there is continuity to ground when the PTO is
OFF, the switch may be inoperative or there may
be a short to ground in the wire leading to it.
If there is not continuity to ground when the PTO
switch is ON, the PTO switch may be inopera-
tive, or there may be an open condition in the
wire that leads to it.
38.16. There is a red wire with black trace between yel-
low wire with a black trace 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 on the transmission support for the
CVT tractors or at the brake caliper on the
hydros. This is a simple metal tang switch that
grounds-out against the transmission control
lever.
• Interpretation: Continuity to ground when the
tractor is not in reverse would indicate a short to
ground north circuit. This could take the form of
a chafed wire contacting ground, a bent reverse
safety switch that is always in contact with
another metal part, or a broken plastic insulator
that separates the switch from the fender.
Lack of continuity to ground would indicate a
broken or disconnected wire leading to the
reverse safety switch, or a switch that is not clos-
ing because of physical damage or corrosion.
38.17. At the opposite end of the top row from the yel-
low wire with black trace is a green wire.
• Behavior: The green wire should always have
continuity to ground.
• Circuitry: The green wire leads to ground.
• Interpretation: If this ground path is not good,
there will probably be other ground-related
issues with the tractor: slow starter motor, slow
battery charge, dim lights. All ground connec-
tions should be mechanically secure and corro-
sion free.
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