-4-
Mandatory Electrical Connections
Ground
- Connect terminals 3 & 4 of the green connector to the negative
terminal of the battery.
(You MUST connect both of these terminals!!)
Siren Power
- Connect Terminals 1 & 2 of the green connector to a 10-
16VDC ignition switched power source
(19-30VDC for the
LCS771-28).
Use minimum size #14 AWG wire.
(You MUST connect both of these terminals!!)
Slide Switch Power
- The three outer metal terminals are internally connected
together and supply power to all three of the slide switch
outputs. Connect at least one of these terminals (see chart
below) through a 20 amp fuse to a 10-16VDC ignition
switched power source
.
Use minimum size #14 AWG wire.
Total Current Draw Of
# of Connections to Input
All Slide Switch Lights
Terminals Required
0A-20A
1
21A-39A
2
41A-60A
3
Rocker Switch Power
- Connect each red wire (six total) through a separate 20 amp
fuse to a 10-16VDC ignition switched power source
.
Use
minimum size #14 AWG wire.
(You MUST connect all 6 of these!!)
Speaker
- Connect terminals 5 and 6 of the green connector to your siren speaker.
(You MUST connect both of these terminals!!)
Optional Electrical Connections
AUX IN/OUT
- Terminals 7 & 8 of the green connector are typically connected to
the steering wheel horn relay. They allow for several functions
including siren operation in HF mode
(see
page 9
),
Air Horn
activation, or Manual “step up” function
(see
page 8
)
.
If you will be using any of these features, cut the wire that connects
the horn relay to the horn. Connect the side from the relay to
terminal 7. Connect the side from the horn to terminal 8. Review
the wiring diagram on page 2 and ensure that you have the
AUX
Polarity
DIP switch set for the correct polarity
(see
page 6
)
.
(You MUST connect both of these terminals as described
above for proper operation of your vehicle horn!!)
Radio Repeat
- If you would like the ability to re-broadcast your two-way radio over
your siren speaker, connect terminals 9 & 10 of the green connector
to the two-way radio speaker or output connector of the two-way
radio.
(Electrical Connections CONT’D)
