TM 9-4120-357-14
(6) Route the circuit breaker flexible cable (17, figure 4-3) to
the top of
the junction box, and attach it
loosely
with the hold-down clamp (16) and two screws. Insert the end of the cable core through hole in the actuating arm (15).
Install the core end fitting (14) over the cable core, allowing 0.12-0.25 inch (3-6 rmm) clearance between end fitting and
actuator arm, and tighten setscrew. Check operation of the flexible cable and circuit breaker by pulling and pushing the
operating knob (18). Tighten screws when the adjustment is satisfactory.
(7) Lead thermostat sensing bulb and capillary tube carefully around right end of
condenser coil to
loop clamp in
center of air intake chamber. Do not kink capillary tube.
(8) Connect all electrical plugs to their receptacle on the junction box and control panel assemblies.
(9) Install the front access panel by placing its lower edge behind the step in the base plate, pushing into posi-
tion, and securing the four panel fastener screws.
Section XV. MAINTENANCE OF WIRING HARNESSES
4-46. General.
The electrical components of the air conditioner are interconnected by wiring harnesses, most of which terminate at
one or both ends in connector assemblies. Two basic circuits are involved in the electrical system the 24-28-volt dc con-
trol circuit, and the 208-volt, 3-phase, ac operating circuit which powers the heaters, compressor, and evaporator and
4-47. Inspection.
Inspect the wiring harnesses for physical damage, including breaking, cutting, burning, missing insulation, deformed
terminals and damaged connector assemblies. Repair or replace, as required.
4-48. Testing.
WARNING
Disconnect power from the air conditioner before performing maintenance work
on the electrical system. The voltages used can be lethal.
tester. (See figure 4-16, Wiring Diagram, and refer to table 4-4, Wire List, for routing and terminations of individual
wires.) Replace individual wires that do not indicate continuity. Also test continuity from each pin connector to the con-
nector shell. Continuity should not be indicated. If it is, replace the connector.
4-49. Replacement.
Each wire in the electrical system of the air conditioner is identified at both ends by a letter-number code. This same
a. Removal When removing an entire wiring harness, proceed as indicated in the following steps, as applicable.
(1) Unscrew retaining sleeve of plug, and pull plug straight out of receptacle.
(2) Remove four screws and nuts, if used, from corners of receptacle to disconnect it from box of panel.
(3) Remove binding screws from screw-type terminals, or pull spade-type terminals straight off of flat connec-
tors.
(4) Unsolder connections by
melting solder with a
soldering pencil or
gun while pulling wire from terminal.
(5) Remove screws from loop clamps, spread clamps to remove from harness, and replace clamps in position
for use at re-assembly.
(6) Press grommets out of partitions, and open at split-line to remove from harness.
4-56