COMPOSITE MARKER LIGHT
This task covers:
General mechanics tool kit,
Semitrailer parked on level ground,
parking brakes applied, and inter-
Electrical repair kit,
vehicular cables disconnected
The following procedure is to be used for either the curbside or streetside
composite marker light. To repair or replace both lights, repeat this procedure as
Using semitrailer electrical schematic (figure FO-1) as a guide, tag and disconnect four electrical connectors (1)
from W2 harness.
Remove two locknuts (2), screws (3), and composite marker light (4) with attached mounting bracket (7) from
platform. Discard locknuts.
Remove two screws (5), lockwashers (6), and mounting bracket (7) from composite marker light (4). Discard
Loosen six captive screws (8) and remove light lens (9) and gasket (10) from composite marker light (4). Discard
Some semitrailers have bulbs in the two lower positions (blackout lights) on the
composite marker light. These bulbs should be replaced with light emitting diodes
Remove bulb (11), bulb (12), LED (13), and LED (14) from composite marker light (4).
4-104 Change 3