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HPK-150 Installation and Operating Instructions Page 7 of 8
CP5061A 02/05/10
SERVICE
The complete system consists of the amplifier, speaker, and switch panel components along with
the wiring and electrical connections. A blown fuse on the amplifier does not necessarily
mean the amplifier is bad. If the system stops functioning or exhibits problems, first check that
the wire and electrical connections to each component are OK then check the following.
On the switch panel, check for power into (center terminal) and out of the switch. On the HORN
SELECT switch, check for power while pressing the horn ring. If there is not power into the
switch, check wire for bad connections and check fuses or breakers in the circuit. If there is
power into but not out of the switch, the switch itself may be bad.
While activating the amplifier (with horn ring), look for the power indicator to light up. If it
lights up the amplifier is OK. If not, check the fuse on the amplifier. If the fuse is OK then check
the RED and BLK power input leads for good supply and ground connections. If power into the
amplifier is OK then the amplifier may be bad.
If the fuse on the amplifier is blown, disconnect the speaker leads at the amplifier and replace
the fuse. As before, activate the amplifier and look for the power indicator to light up. If the fuse
blows again then the amplifier may be bad.
If the power indicator on the amplifier lights up, disconnect the leads at the speaker and check
the speaker inputs with an ohm meter. If the reading is less than 1 ohm or reads as open circuit
then the speaker may be bad. If the ohm meter reading is OK then the wiring or connections
between the amplifier and speaker may be faulty.
The following chart shows typical symptoms and possible causes.
PROBLEMS
PARTS and ACCESSORIES
The following parts and accessories are available from Carson Manufacturing Company, Inc.:
See www.carson-mfg.com for additional information.
or contact our Service Department at:
E-mail service@carson-mfg.com or Phone (888) 577-6877
Part Description
CP4990-150 Fuse, 15 Amp Mini Automotive (for amplifier)
CP4993 Switch, Lighted Rocker (Lite switch on panel)
CP5044-2 Switch, Red Rocker ON - ON (Horn Select switch on panel)
Accessory Description * - standard accessory supplied with unit
ED1924 Cable, 6-P Lead Assembly 15FT (made w/ 3/16” Q.C. Terminals) (for switch panel)
CP4051-XK-12 * Screw, Hex #8 Self Drilling (for mounting)
CP4062-K2545 * Terminal, 3/16” Insulated Fem. Q.C. (for switch panel)
CP5061 * Manual, HPK-150 Instruction
Symptom Possible Cause Check
No power or
output
Power not applied
Connections loose
In-line fuse blown
Loose connection at power source
Bad speaker
Is the power indicator light coming on?
Is an external fuse or circuit breaker used?
Are the negative leads connected to a good ground?
Try another speaker.
Distorted sound Speaker assembly loose
Low vehicle voltage
Is the speaker bell or tip loose?
Input voltage must be greater than lowest rated voltage.
Intermittent tone Connections loose
Bad power connection
Circuit breaker in supply connection
Are the splice connections tight on the unit?
Is there a loose connection on a power lead?
Is a circuit breaker used with at least a 50A rating?