Do not remove any of the screws that are positioned to act as studs for mounting the
electrical box components. All "studs" are 10-32 X 1/2 pan head screws (15, Figure 7-7).
Disconnect wire end terminals from the 24V, Military cable assembly (17) ending at resistors (1,2,3), and
terminal block (6) stud (Ground, White). Ground wire L need not be disconnected unless the electrical
box Is to be removed from the trailer unit.
Disconnect wire end terminals from, the 12V commercial cable assembly (18) wiring harness (] 9) at
terminal block (16).
Disconnect internal component wiring as required.
Remove only that component/s from the electrical box that must be replaced Do not
remove any screw studs unless they are required to be replaced.
Remove component to be replaced by unscrewing mounting nuts, lift out component part or parts to be
Cleaning. Refer to paragraph 6-2. g. for general cleaning procedures.
Inspection Refer to paragraph 6-2. c. for general inspection procedures.
Repair or Replacement. Refer to paragraph 6-2. d. for general repair or replacement procedures.
Assembly. To assemble the electrical box assembly proceed as follows.
If a screw stud (15, Figure 7-7) was removed, replace, and use a good waterproof sealant such as,
silicone base seal. Make certain the opening is sealed.
Replace removed electrical component, using nut (14) to secure the component.
Install internal electrical box wiring (Figure 7-7).
Attach trailer unit wiring harness (19) to terminal block (6) and the commercial 12V cable assy to the
terminal block (6) and circuit breakers (5).
Install commercial 12V cable assembly (18) on applicable circuit breaker (5) and ground post on
terminal block (6).
Install military 24V cable assembly (17) on applicable resistors (1,2,3) and ground post on terminal block
Make certain that all mounting nuts securing the wire terminals are tight, and that spade connectors are
ELECTRICAL BOX (See Figure 7-7): To disassemble the electrical box from a loaded trailer unit, proceed as
The electrical box is mounted on its mounting bracket, which is attached
to mounting posts welded to the front crossmember of the trailer frame
(See Figure 7-1).