TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
13. MAIN FRAME DOES NOT LOAD IN MANUAL MODE (MODEL A ONLY)
(continued).
KNOWN INFO
10.
TEST OPTIONS
Remote controls OK.
Is continuity measured
Continuity Test.
on the cab control box
POSSIBLE PROBLEMS
function switch, with
REASON FOR QUESTION
the switch in the LOAD
Function switch faulty.
The source of the power
position?
MODE SELECT switch
in the main frame LOAD
faulty.
circuit originates with the
function switch in the cab
control box.
Repair cab control
box (para 4-71).
NO
YES
4-256
Change 1
