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Service and Troubleshooting
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
Connector loose
Siren 20A fuse blown
Loose connection at power source
Check connector
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?
Check for a short.
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 (green wire) 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 or
Phaser stuck on
Manual or Horn push buttons stuck
Aux. Input improperly connected
Aux. Input Polarity Option set wrong
Does the 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 TD jumper option configured properly?
If you have review the chart above and still cannot resolve your issue, please
contact our Technical Service department.
When contacting us about a
product you have purchased, please have the product’s serial number
readily available.
Phone: (585) 226-9025
Fax: (888) 478-2797
www.starheadlight.com