Cub Cadet SLTX1000 Series - Manual (Page 151)

Electrical System
145
RMC module plug test (electric PTO)
1. Disconnect the molded 8-pin plug from the RMC
module. See Figure 7.5.
2. 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 7.6.
3. Top left middle square-shape: Yellow wire with
Black trace:
• Behavior: Should show DC power with the key
on.
• Circuitry: The yellow wire with black trace
leads to the PTO switch and the PTO relay. It
allows the RMC module to apply a ground to
the coil of the PTO relay, which energizes the
relay, severing the ground to the PTO clutch. When the PTO relay energizes it also applies a ground to the
PTO switch. This ground loops back to the PTO relay’s coil, latching it in the energized position.
• Interpretation: If behavior is correct, the N.C. side of the PTO switch circuit is functioning properly
If there is continuity to ground, then there is a short
to ground either between the PTO relay and the
RMC module or in the PTO switch circuit.
4. Bottom left middle rounded-shape: Yellow wire
• Behavior: When the terminal is probed (yellow
wire), there should be continuity to ground only
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.
• 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 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 condition in the wire leading to it.
5. Top right middle square-shape: There is a red wire with black trace between yellow 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.
• 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.
Figure 7.5
Purple
Red
Yellow/Black
Figure 7.6
Empty
Empty
1
4
5 8