Using semitrailer electrical schematic (figure FO-1) as a guide, tag and disconnect stop light/tail light socket
connector (1) from W2 harness.
Remove three locknuts (2), clamp (2.1), and three screws (3) and remove stop light/tail light (4) from platform.
Remove retaining ring (5), light lens (6), and gasket (7) from stop light/tail light (4). Do not discard gasket at this
Remove bulb (8) from stop light/tail light (4).
Inspect wire and socket connector for corrosion, frayed or broken wire, and looseness. If socket connector is
defective, use electrical repair kit and replace as required. If wire is frayed or broken, replace stop light/tail light.
Use two layers of shrinkable sleeve insulation to form a seal between connector shell and stop light lead.
Inspect bulb socket for corrosion and defects. If corroded, clean bulb socket by wiping with a wiping rag. If
socket cannot be cleaned or if socket is defective, replace stop light/tail light.
Inspect for burned out bulb. If defective, replace bulb.
Inspect for missing, cracked, or nonsealing light lens and gasket. If light lens is defective, replace lens. If gasket
is defective, replace stop light/tail light.
Install bulb (8) into stop light/tail light (4).
Change 3 4-109