Wiring The Legend In The Vehicle; Wiring The Light Bar In The Vehicle - Federal Signal Corporation Legend LGD Installation, Operation And Service Manual

Wiring the Legend in the Vehicle

Wiring the Legend in the Vehicle
Before wiring the light bar in the vehicle, mount the light bar according to the
instructions included with the mounting kit.
The light bar is completely wired at the factory and does not need any additional
internal wiring. For typical installations with common control systems, see the
wiring schematics in the Appendix starting on page 52. The basic light functions
of the light bar must be controlled by a user-supplied control panel.

Wiring the Light Bar in the Vehicle

AIRBAG DEPLOYMENT: Do not install equipment or route wiring in the
deployment path of an airbag. Failure to observe this warning will reduce
the effectiveness of the airbag or potentially dislodge the equipment,
causing serious injury or death.
SEAT REMOVAL PRECAUTION: If a vehicle seat is temporarily removed,
verify with the vehicle manufacturer if the seat needs to be recalibrated
for proper airbag deployment. Failure to follow this warning cause serious
injury or death.
BATTERY EXPLOSION: To avoid a battery explosion, always disconnect
the negative battery cable first and reconnect it last. Avoid causing a spark
when connecting near or to the battery. The gases produced by a battery
can cause a battery explosion that could result in vehicle damage and
serious injury.
To wire the light bar:
1. Ensure that the lines are adequately fused as shown in the wiring schematics in
the Appendix starting on page 52. From the light bar, route the CAT5 control
cable into the vehicle's cab or trunk near the eventual location of the Serial
Interface Module. An input cable is also provided with the Interface Module.
REVERSE POLARITY / MISWIRING: Reverse polarity or incorrect voltage
may damage the light. To avoid damage to the light, ensure that the battery
voltage is the same as the voltage rating of the light and that the correct
polarity is observed. If you are connecting to a cigarette lighter plug or 12 V
outlet, connect the positive wire to the center terminal and connect the
negative wire to the outer terminal.
2. Route and connect the light bar's black lead to the vehicle battery's ground
(–GND) terminal.
26 Legend LGD and Legend LPX Light Bars
Federal Signal www.fedsig.com