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ton. It will be confirmed that the module is ON by
the illumination of the red LED on the module.
2f. To identify a faulty RMC module: If the
RMC module does not function as
described, the RMC plug test should be the
first step in diagnosis.
•
If the RMC plug test confirms that the safety cir-
cuits (inputs) work as designed, yet the RMC
module does not work properly, the RMC mod-
ule is faulty.
•
The RMC plug test will give an indication of what
the problem is if it is not a faulty RMC module. If
the problem is identified in a particular circuit,
check the safety switch that is associated with
that circuit. If the switch is good, then the prob-
lem lies within the wiring harness.
NOTE: Like the electronic components found on
most cars, the RMC module requires a fully
charged battery to work properly. If the system
voltage falls below 12 V, an accurate diagnosis
of the RMC module is impossible because the
module will be temporarily disabled by low volt-
age.
A Disconnect the molded 8-pin plug from the
RMC module. See Figure 7.5.
Purple
Yellow/White
Red
Figure 7.5
•
•
Green
Red/Black
•
•
Yellow/Black
•
115
B Looking at the plug head-on, it will be con-
figured 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.
Figure 7.6
C 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 leads
directly to the PTO switch.
D Check the PTO and seat safety circuits with
the 8-pin pigtail connector unplugged, then
reconnect 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 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.
ELECTRICAL SYSTEM
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