-15-
Symptom
Possible Cause
Check
No power
Power switch not turned on
Connector loose
Amplifier 15A fuse blown
(one or both)
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
High voltage protection
Low voltage protection
Microphone button stuck
Park Kill polarity option set wrong
Park Kill activated
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?
No siren
tone - No
sound
Bad speaker or speaker wiring
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?
Is there a loose connection on a power lead?
The input must be greater than 10V with 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
Horn switch stuck
MAN push-button switch stuck
Aux. Input improperly connected
Aux. Input Polarity Option set
wrong
Does the horn switch return fully when
released?
Does the MAN push-button 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
Alternate Magnum jumper installed
Is the TT jumper option properly configured?
Is the AUX jumper option configured properly?
Is the Alternate Magnum tone jumper
configured properly?
Phaser not
working
Phaser disabled
Is the PD jumper option configured properly?
TROUBLESHOOTING
