TM 9-2330-227-14&P
LOCATION AND DESCRIPTION OF MAJOR COMPONENTS CONTINUED
A kingpin extends below the bolster pIate. It fits into the truck tractor fifth wheel lower plate for
towing the semitrailer.
An amber service clearance light is located on the upper front corner of each side of the semitrailer
body with a blackout clearance light directly below it.
A red service clearance light is located on the upper rear corner of each side of the semitrailer body
with a blackout clearance light directly below it.
A red reflector is located at each lower front and rear corner of the semitrailer. An amber reflector is
located at each lower side corner of the semitrailer.
With the late model, three red clearance lights appear at the top rear middle of the van body.
Combinations of 24 volt dc and 110 volt ac systems may vary on the early and late model M146
semitrailer.
The early model has seven domelights, one blackout domelight and sixteen receptacles that run
off a 110-volt system inside the semitrailer. The late model has eight domelights, one blackout
domelight, and twenty receptacles that run off a 110-volt system inside the semitrailer. The
semitrailer wiring harness for the 110-volt system lies behind the paneling in the front and top of the
van body. Two junction boxes inside the body control the flow of 110-volt current into the system.
The inside has four 24-volt domelights with both blackout and regular lights.
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