Dual DA604D owner manual Troubleshooting, Installation, Problem, Cause, Action, indicator

INSTALLATION

Troubleshooting

Problem	Cause	Action
	+12V wire not connected or incorrect	Check connections for proper voltage
Unit will not turn on	voltage. REM wire not connected or	(11~16VDC)
(no power LED	incorrect voltage
indicator)	GND wire not connected	Check connection to ground
	Fuse(s) blown	Replace fuse(s)
	Speaker wires not connected	Check connections at speakers
	Volume turned all the way down	Increase volume level at head unit
Unit has power -	One or more speaker wires touching	Insulate all bare speaker wires from
LED is green (but	each other or touching chassis	each other and chassis ground
	ground
no sound)
	Speaker(s) defective or damaged	Check/replace speaker(s)
	Input signal not connected	Check high or low level inputs for
		proper connection
	Incorrect fuse rating	Use fuse(s) with correct rating
Unit blows fuse(s)	+12V wire touching chassis ground	Check for pinched wire
	Speaker(s) defective or damaged	Check/replace speaker(s)
	Bad ground connection	Make sure amplifier is grounded to
		clean bare metal
Engine noise
	Signal ground loop or RFI (radio	Re-route RCA cables from existing
	frequency interference)	high current wiring
	One or more speaker wires touching	Insulate all bare speaker wires from
	each other or touching chassis	each other and chassis ground
	ground
LED illuminates red	Speaker(s) defective or	Check/replace speaker(s)
(protect mode)	damaged internally (shorted)
	Speaker load less than 2 ohms	Adjust speaker load - amplifier will
	(stereo). Speaker load less than 4	not operate at less than 4 ohms
	ohms (bridged)	when bridged
Distorted audio	Incorrect input signal type or	Check connections and reduce/
output	input level too high	adjust input level
Low audio output	Incorrect input signal type or	Check connections and increase/
	input level too low	adjust input level
		Check (+) and (-) speaker
Weak bass	Speaker(s) are wired out of phase	connections
		(Observe correct polarity)

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