TM 1-1520-238-T-4
4101
420.
ENG START CIRCUIT BREAKER DOES NOT STAY CLOSED (WITH ENG START NO 1
420
SWITCH IN START POSITION) (cont)
19. Check for short between P439A16 and ground.
Does short exist?
YES
Go to step 20.
NO
Go to step 21.
20. Detach P977. Check for short between
P439A16 and ground.
Does short exist?
YES
Repair shorted wire between
P439A16 and P977A13.
Go to paragraph 412.
NO
Replace start mode relay panel
(TM 1-1520-238-23).
21. Identify and detach wires from (A402): TB28A,
TB28B, TB28E, TB28F, TB28J, and
TB28N. Check for short between (A402):
J21A2 and ground,
J21A11 and ground,
J21A14 and ground,
J21A15 and ground,
J21A16 and ground,
J15A2 and ground.
Does short exist?
YES
Repair shorted wire between
(A402):
J21A2 and TB28N,
J21A11 and TB28F,
J21A14 and TB28A,
J21A15 and TB28B,
J21A16 and TB28E,
J15A2 and TB28J.
Go to paragraph 412.
NO
Refer to paragraph 612 to
troubleshoot drive system.
END OF TASK