Rack Control Module
TM
Product Manual
Rev. 1.2, May 9, 2014
Page 34
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Symptom 1: Terminal rack controller does not permit loading. A NON-
PERMISSIVE signal is always sent to the terminal rack controller. Confirm
with a UTT.
For Single or Dual TD80 Systems:
Permit: OFF
Sensor 1: OFF
Sensor 2: OFF
Power: OFF
WHAT TO DO:
DETAILS:
WHAT TO CHECK:
REMEDY:
Check for
power and
ground
inside the
RCM
Junction Box
Clip the test
light to the
ground
terminal and
probe the
power
terminal
i.
If the test light illuminates,
check wiring between the
junction box and the RCM
Repair the
wiring or replace
the RCM
ii.
If the test light does not
illuminate, check for a
loose or disconnected
wiring inside the junction
box
Repair or
replace the
wiring
For Single or Dual TD80 Systems:
Permit: RED
Sensor 1: OFF
Sensor 2: OFF
Power: BLINKING YELLOW
WHAT TO DO:
DETAILS:
WHAT TO CHECK:
REMEDY:
Measure the
battery
voltage
inside the
RCM
junction box
Place the
DMM probes
on the power
and ground
terminals
i.
Voltage
measures
greater than
8VDC. Typical
vehicle battery
voltage is
13VDC.
Check wiring between the
junction box and RCM.
Repair the wiring or
replace the RCM
ii.
Voltage
measures less
than 8VDC
1. Check for loose or
corroded wiring inside the
junction box. Repair or
replace the wiring.
2. Ensure that the vehicle
power is from a well
charged battery or DC
power source, 8VDC to
28VDC.
3. Check for loose or
corroded wiring providing
power to the Finch display
and RCM junction box.
Repair or replace the
wiring.