TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
10. NO TRANSIT LIGHT DOES NOT OPERATE PROPERLY (MODEL A ONLY)
(continued).
CONTINUITY TEST
CAUTION
~
Electrical power must be shut off
from circuit before continuity can
be checked. Failure to comply
ACCESSPANEL
with this caution may result in dam-
age to test equipment or electrical
system.
CAB CONTROL BOX
CONNECTOR (P2)
(1) Remove four screws and lockwashers
and access panel from heater
compartment.
(2) Remove cab control box connector
(P2) from cab control box.
(3) Remove main junction box connector
(P4) from main junction box.
(4) Set multimeter to ohms position.
NOTE
A reading of infinity indicates an
open circuit.
(5) Connect one multimeter lead to
connector (P2), position K. Connect
other multimeter lead to connector
(P4), position A, and check
multimeter for continuity. Repeat
Step 5 for all other positions on
connector (P4), except position K.
(6) Connect one multimeter lead to
connector (P4), position K. Connect
other multimeter lead to connector
(P2), position A, and check
multimeter for continuity.
(7) Repeat Step 6 for all other positions
on connector (P2), except position K.
MAIN JUNCTION BOX
CONNECTOR (P4)
4-185
Change 1
