TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
16.1 MAIN FRAME, HOOK ARM, AND WINCH DO NOT OPERATE (MODEL B ONLY)
(continued).
KNOWN INFO
6.
TEST OPTIONS
Error Code, EC 01, EC
Is the resistance of the
Free Flow Valve Solenoid
08 and/or EC 19.
free flow valve solenoid
Test.
Quick-disconnect
3947 ohms?
REASON FOR QUESTION
couplings installed
properly.
Resistance less than or
Hydraulic lines, hoses,
greater than the specifica-
or fittings OK.
tion indicates a faulty free
Cab digital control box
flow valve solenoid.
OK.
Cab interface wiring
harness OK.
Digital controller wiring
harness OK.
POSSIBLE PROBLEMS
Replace free flow
Free flow valve faulty.
NO
valve and solenoid
Digital control box faulty.
YES
If all previous
tests were
completed with a
satifactory result,
replace digital
control box (para
4-386.12
Change 1
9
