CONTROLS AND INDICATORS (Con't)
CONTROL OR INDICATOR
Electrical Receptacle Connector
Provides connection between tractor electrical system and semitrailer
24 volt lights. A cover keeps foreign matter out when cable is discon-
Cover emergency and service air couplings when not coupled to trac-
tor. Keep foreign matter out of semitrailer air lines.
Emergency Air Coupling
Provides connection between semitrailer emergency brake system
and tractor air supply system.
Service Air Coupling
Provides connection between semitrailer service brake system and
tractor air supply system.