TB0339A Page 5 of 9 10/18/03
ELECTRICAL CONNECTIONS
Disconnect vehicle battery before making any electrical connections.
Make electrical connections with supplied wiring harness for siren functions and pressure terminals for light control
outputs. Wiring for the pressure terminals is not supplied. Follow the diagram recommended wire size for pressure
terminals. If necessary, extend wiring harness leads using adequately sized wiring and terminals or splices. If wiring
harness leads are extended longer than 10 ft or the pressure terminal leads are longer than 10 ft, use the next larger
wire size.
Attach leads to pressure terminals by stripping 3/8", inserting into connector and clamp by tightening screw. Make
sure the screw is tight and the wire can't be pulled out.
Failure to adequately tighten the screw can result in improper operation or burning the connector and wire.
Positive Supply: Due to the high current nature of this unit, an appropriate supply line is required. In addition to the
high current delivered to devices on the outputs, the siren amplifier will require peak currents up
to 50 amps for adequate short circuit protection and reliable operation. The preferred source is
directly at the vehicle battery.
Negative Supply: The negative supply line is for the siren amplifier. The siren amplifier will require peak currents up
to 50 amps for adequate short circuit protection and reliable operation. The preferred source is
directly at the vehicle battery.
Speaker: Both connections must be used. Two speakers may be connected in parallel. Observe polarity
(phasing) for maximum sound output.
Radio (Optional): Both connections must be used. The input is isolated and polarity is not important. May need to
adjust RADIO VOLUME on side of amplifier.
Auxiliary Siren
(Optional): The auxiliary siren input allows activation of the Siren button with an external source. Connect to
a normally open switch or to horn ring circuit. Circuit may connect to either positive or negative
for activation. When connected to horn ring circuit, use a SPDT switch to connect horn ring to
either vehicle horn or auxiliary input.
Permanent disconnection of the vehicle horn is NOT recommended.
HORN RING
CONNECTION
HORN
RING
SWITCH
AUX
Added
SPDT
Switch
HORN
(16 páginas)
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