-27-
Service
Symptom
Possible Cause
Check
No power
No power supplied to +12 terminal block
inputs in amplifier.
Connector loose
Amplifier 20A fuse or 5A fuse blown
Loose connection at power source
Does back-lighting come on?
Do you hear a “pop” when turned on?
Is power hooked up backwards? Positive ground
vehicle?
Is an external fuse or circuit breaker used?
Are the negative leads connected to a good ground?
No siren tone -
PA works
No siren tone -
No sound
High voltage protection
Low voltage protection
Microphone button stuck
Park Kill polarity option set wrong
Park Kill activated
Bad speaker or speaker wiring
The input voltage must be less than 16 volts.
The input must be greater than 10V with the siren
turned on.
Does microphone button release properly?
Is the PK jumper option properly configured?
Does the siren work when Park Kill input is
disconnected?
Does either speaker diagnostic LED flash? Check for
a short.
Does neither speaker LED turn on steady? Check
for an open.
No PA
PA volume not set properly
Have you tried turning the PA volume control?
Distorted siren
sound
Speaker assembly loose
Intermittent Aux. Input connection
Low or high vehicle voltage
Is the speaker bell or tip loose?
Is the Aux. Input used and wired properly?
Input voltage must be between 10 & 16 volts while
siren is on.
Intermittent
siren tone
High voltage protection
Low voltage protection
Microphone button activation
Circuit breaker in supply connection
Shorted speaker or speaker wire
Is the vehicle voltage regulator working properly?
Is the connector tight on the back of the unit? Loose
connection on a power lead? The input must be
greater than 10V w/ the siren turned on.
Is something lying on the microphone?
Is a circuit breaker used with at least a 50A rating?
Does the speaker have water damage, or is a wire
pinched?
Horn function
or Manual
function stuck
on
Siren push button switch stuck
Aux. Input improperly connected
Aux. Input Polarity Option set wrong
Does the Siren switch return fully when released?
Is the AUX Input used and wired properly?
Is the AUX jumper option properly configured?
No Radio
No or Low
Radio
Unit not connected to radio
Radio volume too low
Radio outputs not isolated and polarity
hooked up backwards
Is the radio connected properly to the unit?
Can you hear the radio in the vehicle?
Have you tried turning the Radio volume control?
Are the radio wires connected to the correct polarity
from the radio output?
Wrong siren
tone
Two-Tone option jumper installed
Aux. Input set to wrong function
Is the TT jumper option properly configured?
Is the AUX jumper option configured properly?
Phaser not
working
Phaser disabled
Is the PD jumper option configured properly?
Lights not
working
Overloaded or short circuit
Check fuse. Check wire connections.
Arrow stick not
working
Erratic arrow
stick pattern
Or 1
st
or 8
th
head not
working
Fuse blown
Arrow stick option jumpers not set
properly
Poor connection
Using ignition switched power for
arrowstick
Check fuses on arrow stick control box. Check
communication cable.
Is the 6 head stick option selected? Is 8 head stick
option not selected?
Is green connector screwed in tight to lock into
arrow control box? Are all 12 terminal block
connections tight?
Use constant power source for arrowstick, rather
than one that is ignition switched
TROUBLESHOOTING
