Wiring the Integrity Light Bar in the Vehicle
22
Integrity Light Bar
Federal Signal
www.fedsig.com
DRILLING PRECAUTIONS: Before drilling holes, check the area into which you
plan to drill to ensure that you do not damage vehicle components. All drilled
holes should be de-burred and all sharp edges should be smoothed. Additionally,
all exterior drilled holes must be sealed with Motorcraft seam sealer T-A-2-B
or equivalent to prevent the potential exposure to carbon monoxide or other
potentially harmful fumes. Failure to observe this warning could cause serious
injury or death.
2.
Drill a mounting hole at each of the four drill-position marks, sized for the
recommended user-supplied #8 mounting hardware.
3.
Secure the Serial Interface Module to the mounting surface with installer-supplied #8
hardware.
4.
Install the CAT5 serial cable from the light bar to the J3 output jack of the Serial
Interface Module.
5.
Install the three-foot-long, 24-conductor cable from the light bar to the J1 input
connector of the Serial Interface Module.
NOTE:
Powering multiple devices with a common control wire may cause one or more
devices to briefly remain functional after signal power is removed. For example, due to
the high input filter capacitance, a strobe supply can briefly supply the current required
to signal a light bar function to remain on. If necessary, use a relay to isolate devices with
large filter capacitors. See Figure 4. All components/wires are user-supplied.
SHOCK HAZARD: Strobe and HID light systems generate high voltages.
Disconnect power from the system and wait at least 5 minutes before opening the
unit. Do not apply power to the unit while the unit is open. Failure to follow this
warning could result in serious injury or death.
Figure 4
Relay for isolating devices with large filter capacitors
290A7446
+12 Vdc
Control Lead
(12 Vdc Signal Activated)
Relay
Fuse*
Strobe Supply
*Fuse Amperage depends on amperage of devices.
