TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
5.
HAND-HELD SPOTLIGHT DOES NOT OPERATE (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.
12.
TEST OPTIONS
KNOWN INFO
Error Codes, EC11
Is there continuity
Continuity Tests.
Hand-held spotlight bulb
measured on the hand-
REASON FOR QUESTION
OK.
held spotlight connec-
Worklight switch OK.
tor?
If there is no continuity
Wire no. 40 OK.
at the designated
Cab interface wiring
positions on the hand-
harness OK.
held spotlight connector,
Digital controller wiring
the 24 volt power from
harness OK.
the digital controller
does not reach the hand-
POSSIBLE PROBLEMS
held spotlight bulb.
Digital control box
faulty.
Repair or replace
hand-held spotlight
NO
assembly (para 4-
YES
If all previous
tests were
completed with a
satifactory result,
replace digital
control box (para
4-118.6
4- 2
Change 1
