3-26
F-1013-1118
OPERATING INSTRUCTIONS
The ABS is constant powered by the auxiliary (blue)
circuit, center pin on the semitrailer seven-way electrical
connector. This circuit must be hot whenever the tractor
keyswitch is on. This circuit must also not be used to
power any additional electrical devices while the
semitrailer is moving forward. However, additional
devices such as remote controls may be powered from
the auxiliary circuit while the semitrailer is stationary.
Backup power to the ABS is supplied through the stop
lamp (red) circuit, No. 4 pin on the seven-way connector,
and ground is supplied by the white wire, No. 1 pin.
CAUTION
Malfunction in the ABS is signaled by illumination of the
ABS warning lamp located at the left rear side of the
semitrailer. The warning lamp will come on and stay on
while power is supplied to the ABS on a moving vehicle, if
there is a fault. If a fault in the ABS exists, normal braking
will still occur, but wheels may lock. The semitrailer is still
operable, but the system should be serviced as soon as
possible.
CAUTION
Refer to ABS maintenance manual supplied with
semitrailer to answer basic questions for the anti-lock
brake system, obtain outline procedures on how to
adjust, test, remove, and install ABS components, as well
as how to test for faults in the system by using “Blink
Code Diagnostics”; and illustrates ABS components,
wiring, and plumbing installation diagrams.
Cold Weather Operation
1.
Cold weather causes lubricants to congeal, insulation
and rubber parts to become hard, which may lead to
problems found in bearings, electrical systems, and
air systems. Moisture attracted by warm parts can
condense, collect and freeze to immobilize
equipment. The truck/semitrailer operator must
always be alert for indicators of cold weather
malfunctions.
2.
During any extended stop period, neither the service
nor parking brake should be used as they can freeze
up. Use wheel chocks to secure the vehicle from
moving.
3.
Check all structural fasteners, air system fittings,
gaskets, seals and bearings for looseness that can
develop due to contraction with cold. Do not
over-tighten.
4.
Check tire inflation. Tire inflation decreases when the
temperature decreases.
5.
Periodically check drain holes in the bottom of the
relay valve (for trailers with air brakes) and storage
compartments. They must be open at all times to
avoid moisture entrapment.
Hot Weather Operation
1.
Hot weather operation can create certain problems
which must be checked. Expansion of parts result in
tightening of bearings, fasteners, and moving parts.
Failure of gaskets or seals can occur.
2.
The semitrailer should be parked in the shade if
possible. Long exposure to the sun will shorten
service life of rubber components (i.e., tires, light and
hose grommets, hoses, etc.) and paint life.
3.
Check tire pressure early in the day before beginning
operations while the tire is cool. Replace all valve
stem caps after checking.
4.
If the area is extremely humid, protect electrical
terminals with ignition insulation spray. Coat paint
and bare metal surfaces with an appropriate
protective sealer.
5.
The use of a filter-lubricator in the towing vehicle’s air
delivery system is recommended.
The auxiliary (blue) circuit is for powering the
semitrailer ABS. This circuit must be hot when
the tractor key switch is on. No other electrical
devices may be powered by this circuit while the
semitrailer is moving forward.
If a fault exists in the semitrailer ABS, normal
braking will occur, but wheels may lock. Service
the ABS as soon as possible.