Inspect junction box jumper wires for missing or unreadable wire markers. If defective, apply new markings or
replace wire markers. Use semitrailer electrical schematic (figure FO-1) as a guide for proper wire markings.
Inspect junction box jumper wires for frayed or broken wires and loose terminal lugs.
If defects exist, use
electrical repair kit and replace defective terminal lugs or entire jumper wire assembly.
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 terminal boards TB1 and TB2 for missing screws, breaks, cracks, excessive corrosion. If corroded, clean
using dry cleaning solvent as required. If defective, replace as required.
Refer to appendix F and, using electrical repair kit and measuring tape, fabricate new junction box jumper wires
Using wire stripper, strip wires to designated length to allow for terminals to be installed.
Using electrical repair kit, crimp terminal lugs onto fabricated jumper wires as required.