TB0328B
Page 6 of 7
10/18/03
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 or improper installation. The following
chart shows typical symptoms and possible causes.
A blown internal fuse doesn't necessarily mean that the unit is bad. If a speaker or speaker lead is shorted this fuse
will blow before the unit is damaged. Disconnect the speaker leads and replace the fuse. If the siren emits a sound
when in the Yelp position it is OK. Check the speaker or leads for possible shorting.
Check or replace the internal fuse by removing the two screws holding the cover to the bottom of the case. The fuse
is a standard automotive type rated 15AMP.
PROBLEMS
Symptom
Possible Cause
Check
No Power or siren output Power switch not turned on
Bad Speaker
Connector or connections loose
Internal fuse blown
Loose connection at power source
Does Power LED come on?
Do you hear a “pop” when turned on?
With siren on, yelp selected, listen for tone in
amplifier.
Is an external fuse or circuit breaker used?
Are the power leads connected to a good buss?
No siren tone –
PA works
High Voltage Protection
Mic Button stuck
The input voltage must be less than highest rating.
Does Mic Button release properly?
No PA
PA volume not set properly
Function switch in Radio
Try adjusting the internal PA volume control.
PA is not available in Radio position.
Distorted siren sound
Speaker assembly loose
Intermittent Aux Input connection
Low Vehicle voltage
Is the speaker bell or tip loose?
Is the Aux Input used and wired properly?
The input voltage must be greater than lowest rating.
Intermittent siren tone
High Voltage Protection
Connector loose
Loose connection at power source
Mic Button activation
Circuit breaker in supply
connection
Is the vehicle voltage regulator working properly?
Is the connector tight on the back of the unit?
Check for loose leads back to power source.
Is something lying on the microphone?
Is a circuit breaker used with at least 50A rating?
Horn or manual stuck on
Siren switch stuck
Aux Input improperly connected
Does the Siren pushbutton switch return fully when
released?
Is the Aux Input used and wired properly?
No Radio
Unit not connected to a radio
Radio volume too low
Is the radio connected properly to the unit?
Can you hear the radio in the vehicle?
Try adjusting the internal radio volume control.
RETURN
If you have any questions concerning this or any other Carson product, please contact our
Technical Service
Department
at (888) 577-6877. Many issues can be handled over the phone. We can also be reached via e-mail at
If a product must be returned for any reason, please contact our Technical Service Department to obtain a Returned
Merchandise Authorization number (RMA#) before you ship the product to Carson. Please write the RMA# clearly on
the package near the mailing label. Be sure to provide a return address, contact and phone number, along with a brief
description of the problem.
