TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
21. REMOTE CONTROL LIGHT INOPERATIVE, ERROR CODE 25, (MODEL B ONLY)
(continued).
NOTE
The digital controller and the cab control box are not repairable,
therefore, it is necessary to test the digital controller and cab
interface wiring harnesses, switches, solenoids, and other com-
ponents to identify possible faults other than the digital controller
and the digital cab controller.
KNOWN INFO
3.
TEST OPTIONS
Error Code, EC 01 and/or
Continuity Tests.
Is there continuity
EC 25.
measured between the
REASON FOR QUESTION
Remote control box light
digital controller wiring
bulb OK.
harness (J4) and (P2)?
If there is no continuity
Cab digital control box
at the designated
OK.
positions on the digital
Cab interface wiring
controller wiring harness,
harness OK.
the 24 volt power from
the cab digital control
POSSIBLE PROBLEMS
box does not reach the
Digital controller wiring
digital control box.
harness faulty.
Digital control box faulty.
Repair or replace
digital controller
NO
wiring harness
YES
4-434.22
16
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