DESCRIPTION AND USE OF OPERATOR'S CONTROLS AND INDICATORS - CONTINUED
FUNCTION OR USE
KEY
CONTROL OR INDICATOR
Provide the connection between the semitrailer service
1
brake system and the towing vehicle air supply system.
Provide the connection between the semitrailer
2
Three emergency coup-
lings
emergency brake system and the towing vehicle air
supply system.
Provides connection between the 110-volt semitrailer
Electrical connector,
3
110-volt
system and an outside power source. A cover keeps
out dirt when the power is disconnected.
4
Provides connection between the 24-volt semitrailer
Electrical connector,
24-volt (Intervehicular
system and the towing vehicle's electrical system.
A cover keeps out dirt when the cable is disconnected.
cable)
Cover semitrailer couplings when not coupled to towing
Six dummy couplings
5
vehicle. Keep dirt out of semitrailer lines.
2-4