Installation and Programming Instructions
14
Model 331105 SMC5 SignalMaster Controller
LOW Button
Changes all directional patterns to turn lamps on then off in sequence until a pattern is completed. The
last lamp activated in the pattern will flash three times. The LOW setting also affects the warn signals by
reducing the number of lighted lamps or dwell time. The selection of this function reduces the current
draw for the light assembly’s patterns. The AUX Button function is unaffected by the LOW Button. In
Title 13 Mode, the LOW function is disabled.
Auxiliary Input
If connected at the time of installation, application of a positive (+) 12
-
24 Vdc or ground to the AUX IN
connection produces the WARN pattern described above in “WARN Button.” When the positive (+)
12-24 Vdc or ground is removed from the AUX IN connection, the WARN pattern stops. Slide switch
activation also overrides the WARN pattern, turning it off and displaying the selected directional pattern.
When the slide switch is returned to the OFF position, the warning pattern returns, provided there is an
active signal at the auxiliary input. Typically, the operator has no direct control over the auxiliary input,
because it would be tied to another separate device for its power signal.
Turn Signal Override
When the controller is installed with the turn signal override feature connected to the vehicle turn-signal
circuit, the controller stops any active pattern and flashes the appropriate end lamps in sequence with the
turn signals or hazard lights. No operator input is needed to activate this feature, if connected.
Testing the Installation
LIGHT HAZARD—To be an effective warning device, an emergency warning
system produces bright light that can be hazardous to your eyesight when
viewed at a close range. Do not stare directly into the lights at a close range or
permanent damage to your eyesight may occur.
After testing the installation, test the emergency warning system to ensure that it is operating properly. Also
test all vehicle functions, including horn operation, vehicle safety functions, and vehicle lighting systems to
ensure proper operation. Ensure that the installation has not affected the vehicle operation or changed any
vehicle safety functions or circuits.
Do not test the light system of the vehicle while driving. Operating the vehicle warning systems may pose a
hazard to the operator and other drivers if the systems do not function as expected. Test the vehicle only in
a controlled environment. After testing is complete, provide a copy of these instructions to the instructional
staff and all operating personnel.
Getting Technical Support and Service
If the controller is not working properly, remove the fuses before disconnecting the wires from the unit to
prevent shorts. Disconnect all electrical connections starting with the power leads. Remove the controller
from the mounting bracket. See “Returning a Product to Federal Signal” for further instructions.
