Inspect for missing or unreadable wire markers and terminal marker strips. If defective, restamp or replace wire
markers and terminal marker strips. Use semitrailer electrical schematic (figure FO-1) as a guide for proper wire
Inspect jumper wires for frayed or broken wires and loose terminal lugs. If defective, use electrical repair kit and
repair or replace point-to-point wire(s) (appx. F).
Inspect for missing, cracked, or nonsealing receptacle cover. If defective or missing, replace cover.
Using a digital multimeter, check resistance of all three fixed resistors. Readings for fixed resistors R1 and R3
should be 7.0 ohms 1.0 percent. Reading for fixed resistor R2 should be 2.0 ohms 1.0 percent. If a reading is
not correct for a fixed resistor, replace as required.
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, and excessive corrosion. If corroded,
clean using dry cleaning solvent as required. If defective, replace as required.
Inspect all components for corrosion. If corrosion is found, clean using dry cleaning solvent as required.
Refer to appendix F and, using electrical repair kit and measuring tape, fabricate new point-to-point wires for
gooseneck component assembly as required.
Using wire stripper, strip fabricated wires to designated length and allow for terminals to be installed or wires to be
Using electrical repair kit, crimp new terminal lugs onto point-to-point wires as required.