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HPK-150 Installation and Operating Instructions

Page 7 of 8

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

Symptom	Possible Cause	Check
No power or	Power not applied	Is the power indicator light coming on?
output	Connections loose	Is an external fuse or circuit breaker used?
	In-line fuse blown	Are the negative leads connected to a good ground?
	Loose connection at power source
	Bad speaker	Try another speaker.
Distorted sound	Speaker assembly loose	Is the speaker bell or tip loose?
	Low vehicle voltage	Input voltage must be greater than lowest rated voltage.
Intermittent tone	Connections loose	Are the splice connections tight on the unit?
	Bad power connection	Is there a loose connection on a power lead?
	Circuit breaker in supply connection	Is a circuit breaker used with at least a 50A rating?

PARTS and ACCESSORIES

The following parts and accessories are available from Carson Manufacturing Company, Inc.:

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

See www.carson-mfg.com for additional information.