a. 24-volt electrical system controlled by a switch
and circuit breaker in towing vehicle.
b. A receptacle is located on the front cross-
member for connection of the semitrailer elec-
trical system to the towing vehicle.
c. Equipped with a service, tail and stop, and
blackout taillight on the left rear and a blackout
tail and stop light on the right rear.
d. Amber blackout and service clearance
Figure 2-23. Service lights (M127 and M127A1)
lights are on the front sides.
e. Red blackout and service clearance lights
are on the rear sides.
f. Electrical cables are rubber covered with
soldered terminals or connectors. The plugs, or
sockets, are covered with metal shelIs with
rubber bushings on the M127, and with rubber
shells with plastic sleeves on the M127A1 to
form watertight joints. Clip assemblies hold
the shells in place on the frame. Rubber
grommets protect the cables when they pass
Figure 2-24. Electrical connections at rear of front
crossmember (M127 and M127A1)