TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
14. MAIN FRAME DOES NOT UNLOAD IN MANUAL MODE (MODEL A ONLY)
(continued).
UPPER
BODY
CONTINUITY TEST
CAUTION
Electrical power must be shut off
from circuit before continuity can
be checked. Failure to comply
with this caution may result in dam-
age to test equipment or electrical
system.
(1) Remove four screws and lockwashers
from cab control box.
(2) Remove six screws from cab control
box, and separate upper body from
base.
CAUTION
Use care when removing relay from
circuit board. Failure to comply
with this caution may result in dam-
age to circuit board.
BASE
(3) Remove relay no. K5 from cab control
box circuit board.
(4) Set multimeter to ohms position.
NOTE
A reading of infinity indicates an open
circuit.
(6) Connect one multimeter lead to
center terminal, 87A, of relay K5
socket and the other multimeter lead
to the cab control box connector,
position F. Check multimeter for
continuity.
RELAY K5
SOCKET POSITION
87A (CENTER)
CAB CONTROL
BOX
CONNECTOR
(J2)
Change 1
