-9-
Troubleshooting
Symptom Possible Cause Check
No power Check power Wires
Fuse or circuit breaker
blown
When activated, power to both Terminals 2 and 6?
Is power hooked up backwards? Positive ground
vehicle?
Are the negative leads connected to a good
ground?
Measure voltage between ground & +12v terminal
Measure voltage between ground & ignition
switched terminal.
Check Fuse under amplifier cover.
Check external fuses or circuit breakers
No siren tone Bad speaker or speaker
wiring
High voltage or low voltage
protection
Blown Fuse
Does LED remain off when siren tone is selected?
Disconnect the speaker at the amplifier, and turn a
tone on. If you hear sound, the siren is working
correctly and you have a failed speaker or faulty
speaker wiring .
Is LED single flashing?
Measure voltage between ground & ignition
switched terminal. The input voltage must be
between 10 & 16V
Check fuse inside amp housing
Distorted siren
sound
Speaker assembly loose
Intermittent AUX input
connection
Low or high vehicle voltage
Is the speaker loose?
Is the Aux. Input used and wired properly?
Is LED single flashing?
Input voltage must be between 10 & 16 volts while
siren is on.
Intermittent siren
tone
Low voltage protection
Circuit breaker in supply
connection
Shorted speaker or speaker
wire
Wires connected tightly to the back of the unit?
Loose connection on a power lead?
Input greater than 10V with the siren turned on?
Is a circuit breaker used with at least a 30A rating?
Does the speaker have water damage, or is a wire
pinched?
Horn function or
Manual function
stuck on
Aux. Input improperly
connected or Aux. Input
Polarity Option set wrong
Remove the Aux input wire at the amp. Does the
problem stop? If so the aux polarity may be set
wrong or the aux wire may be wired incorrectly
Wrong siren tone Option accidentally changed See programming and setting to defaults section
Auto Shutdown
This unit is designed to automatically shut down when certain undesirable conditions exist to
prevent internal damage. All audio functions are disabled until the issue is corrected.
• Over Voltage/Under Voltage
• Over Current
Micro Feedback LED
This unit is designed with an LED that not only
provides feedback when programming, but also
helps troubleshoot audio issues.
LED Pattern Diagnosis
Steady On Speaker functioning properly
Off No Siren Tone Active or Speaker open (faulty connection)
Single Flash Over Voltage/Under Voltage
Double Flash Over Current
Micro Feedback LED
(20 pages)
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