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.
4.
KNOWN INFO
TEST OPTIONS
Error Code, EC 01 and/or
Continuity Test.
Is continuity measured
EC 25.
on the digital controller
Remote control box light
wiring harness, remote
REASON FOR QUESTION
bulb OK.
control light circuit?
Cab digital control box
Power to activate the
OK.
remote control light
Cab interface wiring
circuit is transferred from
harness OK.
the digital control box to
the remote control light
POSSIBLE PROBLEMS
via this harness.
Digital controller wiring
harness faulty.
Digital control box faulty.
Repair or replace
digital controller
NO
wiring harness
YES
If all previous
tests were
completed with a
satifactory result,
replace digital
control box (para
4-414.24
Change 1
38
