Operating instructions

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Figure 3-2. Rear View of PA300.
Figure 3-3. Control Cable Wiring Diagram.
CAUTION
To avoid damage to the unit, the 1/4-20 x 1/2
hex head cap screws and the 1/4 split
lockwashers must be used as shown in figure
3-1.
E. Tilt the unit to the desired position.
Tighten the 1/4-20 x 1/2 hex head screws.
3-3. POWER CABLE INSTALLATION.
CAUTION
Wiring changes have been made which
utilizes a new type of power cable. If this unit
is used to replace an older PA300, use the
optional cable adaptor (761300) to connect the
originally installed power cable to the new
siren.
This unit is NOT designed as a replacement
in a two-speaker installation. The siren
amplifier WILL be damaged if two speakers
are installed.
A. Speaker.
The unit is designed to operate with one 11-
ohm impedance speaker or one low power (58W)
speaker. See figure 3-2.
CAUTION
Damage to the unit will occur if speaker wires
are improperly connected. NEVER CON-
NECT the brown SPEAKER HIGH POWER
(100W) wire and orange SPEAKER LOW
POWER (58W) wire together to the
speaker(s).
Using 18 gauge wire, connect one speaker
lead (58W speaker to SPEAKER LOW POWER or
100W speaker to SPEAKER HIGH POWER) as
shown in the Control Cable Wiring Diagram, figure
3-3. Connect the other speaker wire to the blue
(SPKR, COM) wire.
B. Radio.
To allow incoming radio messages to be
rebroadcast over the outside speakers, connect the
two brown zip cord leads (pins 1 and 2) across the
two-way radio’s speaker.
C. Horn Ring.
In order to utilize the Tap II and Press-and-
Hold features of the siren, the following procedure
must be performed.
1. Locate the wire that connects the
vehicle horn ring switch to the horn or horn relay.
Cut this wire.
2. See figure 3-4. Splice the white/yellow
control cable wire (pin 4) to the horn ring side of the
wire that was cut in step 1. Insulate the splice with
user-supplied wire nuts.
CAUTION
The horn ring transfer circuit of the siren is
capable of switching a maximum of 2-am-
peres. Some vehicles do not have a horn relay
and, consequently, will draw more than 2-
amperes when the vehicle horn is activated.
Consult your vehicle service manual or a
qualified mechanic to determine the current
required to activate the horn. If it is less
than 2-amperes, perform the procedure in
step 3. If it is greater than 2-amperes,
perform steps 4 through 10.
290A4452-0
3
ORG (SPKR, LO)
BRN (SPKR, HI)
WHT (HORN)
WHT/YEL (HORN RING)
BRN (RIBBED) (RADIO)
BRN (NON-RIBBED) (RADIO)
ZIP CORD
8
9
5
4
2
1
BLU (SPKR, COM)
7
12345
678910
RED (POWER +)
BLK (GROUND -)
290A4452-04C