Wiring the Integrity Light Bar in the Vehicle
25
Installation, Maintenance, and Service Manual
Federal Signal
www.fedsig.com
If the light bar is equipped with AutoDim, it will automatically dim at night as long as the
controller is not in MODE 3. Once MODE 3 is removed, the light bar will again dim to 50
percent of full brightness.
NOTE:
The may take a few minutes to change light intensity after an ambient light
change.
Ignition
To connect the Serial Interface Module to the ignition circuit:
1.
Connect the white wire from the supplied J1 cable harness on the Interface Module to
a 1 A fuse.
2.
Connect the fuse end as close as possible to switched ignition power. Power should
also be present in the cranking position.
3.
Connect the black and black/white wire from the 24-pin cable harness on J1 from the
Serial Interface Module to battery ground (–GND). Use 16 AWG wire to extend the
cable length.
SignalMaster Connections
If SignalMaster
®
operation is not activated by a control head or external controller,
the SignalMaster LED heads flash with the selected priority mode (Mode 1, 2, or 3) of
operation.
Internal SignalMaster (Factory Default)
Internal operation uses the light bar’s built-in SignalMaster controller to generate
directional warning patterns. With internal operation, an external SignalMaster controller
is not needed. A standard low current switch box can activate the light bar’s internal
SignalMaster controller. To activate the light bar’s internal SignalMaster controller, apply
12 Vdc (+BAT) to the SignalMaster control wires
External SignalMaster
External operation uses the Serial Interface Module to drive each SignalMaster directional
warning head independently through an external Federal Signal SignalMaster controller
or SS2000SM series siren (Figures 5 through 8). Either device provides an independent
ground signal to turn on each head. To cross reference external SignalMaster wiring to a
Federal Signal controller or the SM2000SM series siren, see Table 7.
