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
CAB CONTROL BOX
CONNECTOR (P2)
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) Disconnect main junction box
connector (P4) from junction box.
(2) Set multimeter to ohms position.
NOTE
A reading of infinity indicates an
open circuit.
(3) Connect multimeter to leads at each
end of (24-pin) linking harness, and
check multimeter for continuity. Pay
special attention to harness positions
N, K and Q.
NOTE
Any reading besides infinity
indicates a grounded wire.
(4) Remove multimeter lead from one end
of wire and connect to chassis
ground.
MAIN JUNCTION BOX
CONNECTOR (P4)
4-191
Change 1
