-9-
SERVICE
This unit is designed to provide years of reliable service under even the worst
conditions. Many times there may appear to be a problem with the unit when the
true problem is in the speaker(s) or improper installation. The following chart
shows typical symptoms and possible causes.
TROUBLESHOOTING
Symptom
Possible Cause
Check
No power
Power switch not turned on
Connector loose
Siren 15A fuse blown
Do not have +12VDC on Red & Yellow
wires
Loose connection at power source
Turn Thumb Wheel
Do you hear a "pop" when turned on?
Is power hooked up backwards? Positive ground vehicle?
Do mounting bolts protrude too far into siren housing?
Is an external fuse or circuit breaker used?
Are the negative leads connected to a good ground?
No tone - PA
works
No sound
High voltage protection
Low voltage protection
Microphone button stuck
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?
Check speaker
No PA
PA volume not set properly
Have you tried turning the PA volume control?
Distorted 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 sound
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 30A rating?
Does the speaker have water damage, or is a wire pinched?
Horn function
stuck on
Horn switch stuck
Aux. Input improperly connected
Aux. Input Polarity Option set wrong
Does the horn 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?
