TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
17. BAP WINCH DOES NOT OPERATE (MODEL B ONLY).
NOTE
The digital controller and the cab digital control box are not repairable,
therefore, it is necessary to test the digital controller and cab interface
wiring harnesses, switches, solenoids, and other components to identify
possible faults other than the digital controller and the digital cab
controller.
3.
KNOWN INFO
TEST OPTIONS
Voltage Test.
Error Code, EC 17.
Are 22-28 volts
Quick-connect couplings
measured at the cab
REASON FOR QUESTION
OK.
interface wiring
Hydraulic lines, hoses,
Power to activate the BAP
harness connector
or fittings OK.
winch solenoids is
(J2), position "2" and
supplied from the cab
position "3"?
POSSIBLE PROBLEMS
digital control box to the
digital controller wiring
Cab digital control box
harness via this harness.
faulty.
Faults in this harness will
Cab interface wiring
prevent operation from the
harness faulty.
cab digital control box.
Digital controller wiring
harness faulty.
Winch in valve faulty.
Winch out valve faulty.
Digital control box faulty.
Repair or replace
cab interface
NO
wiring (para 4-
YES
4-390.2
2
Change 1
