-8-
Figure 3-8. External High Idle Control or
Common Microphone Module.
numbers shown are for the recommended Federal
Signal relay.
7.
Connection to Power Source (see
figure 3-6).
The SS2000-LMS must operate from a
12 volt NEGATIVE ground vehicle electrical system.
Therefore, before making any electrical connections,
verify the polarity of the vehicle electrical system
ground.
NOTE
Transient noise pulses caused by the automo-
tive power system or surge currents due to
switching inductive or incandescent lamp loads
may cause malfunctions in the SS2000-LMS
if proper wire routing is not followed.
The Amplifier Unit red (positive) power
cable lead should be as short and direct to the
fuse block or user-supplied switch (current
capacity of at least 20 amps) as possible. DO
NOT splice to accessory power leads.
The Amplifier Unit's black (negative)
power cable lead should be as short and direct
to the fusible link on the front fender as pos-
sible. DO NOT splice to accessory negative
(black) leads.
IMPORTANT
The SS2000-LMS does not have an on-off
switch. If power is obtained directly from the
vehicle battery, the system will continuously
draw approximately 0.5A and will eventually
discharge the vehicle’s battery. It is RECOM-
MENDED that the Amplifier Unit's power
be obtained from a vehicle circuit that is
powered in the RUN, and START positions.
Power can also be obtained from a user-supplied
switch (current capacity of at least 20 amps).
The load manager will not function properly if
power obtained from a user-supplied switch
controls power to any other device.
CAUTION
Before drilling holes in ANY part of a vehicle,
ensure that both sides of the surface are clear
of parts that could be damaged; such as brake
lines, fuel lines, electrical wiring or other vital
parts.
a.
Connect the green power cable
lead to the vehicle chassis as close as practical to the
Amplifier Unit. Scrape paint away from the selected
bolt hole to assure a good electrical connection to the
chassis.
b.
Power for the Amplifier Unit can
be obtained from the vehicle’s fuse block; or a dedi-
290A3913-11
+
12VDC
PRP. WIRE FROM SIREN
POWER CABLE, PIN 8
85
30
86
GROUND
87
AUXILIARY
DEVICE
cated (cannot share power with other devices) 20-
ampere fused, switched circuit. When obtaining
power from the vehicle’s fuse block, refer to the
vehicle’s wiring manual to ensure the unit will be
powered in the RUN and START positions.
Route the red (+) power cable lead
to the fuse block or user-supplied switch. When the
red (+) power cable lead is routed to the fuse block,
install the supplied fuse clip adapter as follows (see
figure 3-6):
(1). Slip the fuse clip adapter
over the fuse.
(2). Insert the adapter clip/fuse
into the applicable fuse block location (refer to the
vehicle’s wiring manual) with the adapter clip end
toward the top of the fuse block. Make sure that the
selected fuse block location is capable of supplying an
additional 20-amperes.
(3). Attach the power cable’s red
wire on the fuse clip.
c.
To protect the wires, use the in-
line fuseholder and 20-ampere fuse. The fuseholder
and fuse should be installed in the red (+) lead as
close as practical to the power source.
d.
Route the black (-) power cable
lead through the previously drilled hole into the
engine compartment, and through existing clamps
and holders toward the fusible link on the front
fender. DO NOT make any connections to the battery
until all other wiring is complete.
IMPORTANT
The red (+) power and black (-) power wires
must be connected as described or the load
manager WILL NOT function properly.
B.
Light Bar and Auxiliary Light Connections.
The SS2000-LMS is programmed at the
factory to satisfy most installation requirements.
Before proceeding with installation, refer to the
supplied Operation and Configuration Instructions
for a description of the “standard” program, and
instructions on how to change the programming.
