TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
14. MAIN FRAME DOES NOT UNLOAD IN MANUAL MODE (MODEL A ONLY)
(continued).
15.
KNOWN INFO
TEST OPTIONS
No power from cab
Is continuity measured
Continuity Test.
control box.
between the cab con-
trol box connector (J2),
REASON FOR QUESTION
POSSIBLE PROBLEMS
position F, and relay
If there is continuity
Relay no. K5 faulty.
K5, position 87A?
between the cab control
Cab control box faulty.
box connector and the
relay socket, the cab
control box is OK and the
relay is faulty. If there is
no continuity, there is an
open circuit in the cab
control box.
Repair cab control
NO
box (para 4-71).
Replace relay no.
YES
K5 (para 4-71).
Change 1
4-296
