TM 9-2330-386-14&P
2-4 NOSE PLATE.
a. The nose plate (1) has the connections for the air lines and electrical cables
from the towing vehicle to the semitrailer.
b. SERVICE gladhand (2) and EMERGENCY
gladhand (3) couplings provide the
connection between the semitrailer brake
s y s t e m and the towing vehicle air supply
system.
c . Two dummy couplings (4) are fitted
to the SERVICE and EMERGENCY air hose
are not connected to the towing vehicle.
dirt and moisture from entering the
d. Electrical receptacles (5 and 6) provide the connections between the
semitrailer lights and the towing vehicle electrical system. Both receptacles use
spring loaded covers to keep foreign matter out when the cables are disconnected.
The left (roadside) receptacle (5) is for 24 volt; the right (curbside) receptacle
(6) is for 12 volt.