Dry cleaning solvent (P-D-680, Type III) is used to clean parts and is potentially
dangerous to personnel and property. Extinguish all smoking materials and do not
allow sparks or open flames near the work area. Use skin and eye protection and
work in a well-ventilated area. Flash point of dry cleaning solvent is 200F (93C).
Inspect junction boxes for corrosion, breaks, cracked or missing grommets, or defective cover. If corroded, clean
using dry cleaning solvent as required. If defects exist, replace defective part.
Inspect jumper wires and wiring harness terminal lugs for corrosion, frayed or broken wires, and looseness. If
defective, use electrical repair kit and replace defective terminal lugs, jumper wires, and/or wiring harnesses.
Inspect for missing or unreadable wire markers. If defect exists, replace or restamp wire marker. Use semitrailer
electrical schematic (figure FO-1) as a guide for proper wire markings.
Inspect loom surrounding wire bundle for fraying, cuts, and damage. If defective, use electrical tape over affected
area as required to keep water from settling into harness.
Aline and install junction box (3) to platform and secure with two lockwashers (5) and nuts (4).
Using semitrailer electrical schematic (figure FO-1) as a guide, reconnect Jumper wires and W1, W2, W3, and W4
harnesses to junction box (3).
Install cover (2) onto junction box (3) and secure with two screws (1).
Reconnect intervehicular electrical cable and check all lights, including steering pressure indicator light, for proper