CAUTION
CAUTION
The horn ring transfer circuit of the siren
The horn ring transfer circuit of the siren
is capable of switching a maximum of 2-
is capable of switching a maximum of 2-
amperes. Some vehicles do not have a horn
amperes. Some vehicles do not have a horn
relay and, consequently, will draw more
relay and, consequently, will draw more
than 2-amperes when the vehicle horn is
than 2-amperes when the vehicle horn is
activated. Consult your vehicle service
activated. Consult your vehicle service
manual or a qualified mechanic to
manual or a qualified mechanic to deter-
deter-
mine the current required to activate the
mine the current required to activate the
horn. If it is
horn. If it is
less
less
than 2-am
than 2-amperes,
peres, perform
perform
the procedure in step 3. If it is
the procedure in step 3. If it is
greater
greater
than
than
2-amperes, perform steps 4 through 10.
2-amperes, perform steps 4 through 10.
3.
3. Splic
Splice the whit
e the white contr
e control cable w
ol cable wire (P5
ire (P5,,
pin 10) to the horn side
pin 10) to the horn side of the cut wire. Insulate the
of the cut wire. Insulate the
splice with a wire nut.
splice with a wire nut.
4.
4. Obtain a S
Obtain a SPST re
PST relay of suf
lay of sufficie
ficient conta
nt contact
ct
current capacity to activate the vehicle horn. Refer to
current capacity to activate the vehicle horn. Refer to
figure 3-4 while performing the following steps.
figure 3-4 while performing the following steps.
5.
5. Mount t
Mount the rela
he relay in a sui
y in a suitable lo
table locatio
cation.
n.
6.
6. Conne
Connect the h
ct the horn sid
orn side of the
e of the wire cu
wire cut in
t in
step 1 to the relay contact terminal.
step 1 to the relay contact terminal.
7.
7. Deter
Determine th
mine the “sens
e “sense” of t
e” of the vehi
he vehicle’s
cle’s
horn ring activation circuit, i.e., does the horn circuit
horn ring activation circuit, i.e., does the horn circuit
require a switched positive voltage or switched
require a switched positive voltage or switched
ground for activation.
ground for activation.
8.
8. Conne
Connect the r
ct the relay w
elay wiper te
iper termina
rminal to the
l to the
positive or negative potential determined in step 7.
positive or negative potential determined in step 7.
9.
9. Conne
Connect the w
ct the white co
hite control c
ntrol cable wi
able wire to
re to
one end of the relay coil.
one end of the relay coil.
10. Connect the other end of the relay coil
10. Connect the other end of the relay coil to
to
the opposite potential of that connected to the wiper
the opposite potential of that connected to the wiper
in step 8.
in step 8.
D.
D.
Connection to Power Source
Connection to Power Source
..
The PA300 can operate from any 12-volt
The PA300 can operate from any 12-volt
positive or negative ground vehicle electrical system.
positive or negative ground vehicle electrical system.
Figure 3-4. Horn Ring Connections.
Figure 3-4. Horn Ring Connections.
-5-
-5-
Figure
Figure 3-2.
3-2. Rear
Rear View
View of
of PA300.
PA300.
A.
A.
Speaker
Speaker
..
CAUTION
CAUTION
Connecting a low power speaker (58W), or
Connecting a low power speaker (58W), or
two speakers, to the unit will damage the
two speakers, to the unit will damage the
siren or speaker(s). Always use one 11-ohm,
siren or speaker(s). Always use one 11-ohm,
high power (100W) speaker.
high power (100W) speaker.
The unit is designed to operate with one
The unit is designed to operate with one 11-
11-
ohm, high power (100W) speaker.
ohm, high power (100W) speaker.
Connect the speaker leads (18 gauge wire)
Connect the speaker leads (18 gauge wire)
as shown in Control Cable Wiring Diagram, figure
as shown in Control Cable Wiring Diagram, figure
3-3.
3-3.
B.
B.
Radio
Radio
..
To allow incoming radio messages to be
To allow incoming radio messages to be
rebroadcast over the outside speakers, connect the
rebroadcast over the outside speakers, connect the
two brown zip cord leads (P5, pins 9 and 12)
two brown zip cord leads (P5, pins 9 and 12) across
across
the two-way radio’s speaker.
the two-way radio’s speaker.
C.
C.
Horn Ring
Horn Ring
..
In order to utilize the Tap II
In order to utilize the Tap II and Press-and-
and Press-and-
Hold features of the siren, the following procedure
Hold features of the siren, the following procedure
must be performed.
must be performed.
1.
1. Loca
Locate the wir
te the wire that co
e that connects t
nnects the vehic
he vehicle
le
horn ring switch to the horn
horn ring switch to the horn or horn relay. Cut this
or horn relay. Cut this
wire.
wire.
2.
2. See fig
See figure 3-4
ure 3-4. Splic
. Splice the whit
e the white/ye
e/yellow
llow
control cable wire (P5, pin 7) to the
control cable wire (P5, pin 7) to the horn ring side of
horn ring side of
the wire that was cut in
the wire that was cut in step 1. Insulate the splice
step 1. Insulate the splice
with the wire nuts (supplied).
with the wire nuts (supplied).
Figure 3-3. Control Cable Wiring Diagram.
Figure 3-3. Control Cable Wiring Diagram.
