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XIA4225 OPERATION
Troubleshooting
Problem Cause Action
Unit will not turn on
(no power LED indicator)
+12V wire not connected or incorrect voltage
REM wire not connected or incorrect voltage
Check connections for proper voltage
(11~16VDC)
GND wire not connected Check connection to ground
Fuse(s) blown Replace fuse(s)
Unit has power - LED is
green (but no sound)
Speaker wires not connected Check connections at speakers
Volume turned all the way down Increase volume level at head unit
One or more speaker wires touching each
other or touching chassis ground
Insulate all bare speaker wires from
each other and chassis ground
Speaker(s) defective or damaged Check/replace speaker(s)
Input signal not connected Check high or low level inputs for
proper connection
Unit blows fuse(s)
Incorrect fuse rating Use fuse(s) with correct rating
+12V wire touching chassis ground Check for pinched wire
Speaker(s) defective or damaged Check/replace speaker(s)
Engine noise
Bad ground connection Make sure amplifier is grounded to
clean bare metal
Signal ground loop or RFI
(radio frequency interference)
Re-route RCA cables from existing
high current wiring
LED illuminates red
(protect mode)
One or more speaker wires touching each
other or touching chassis ground
Insulate all bare speaker wires from
each other and chassis ground
Speaker(s) defective or damaged internally
(shorted)
Check/replace speaker(s)
Speaker load less than 2 ohms (stereo)
Speaker load less than 4 ohms (bridged)
Adjust speaker load - amplifier will
not operate at less than 4 ohms when
bridged
Distorted audio output
Incorrect input signal type or input level too
high
Check connections and reduce/adjust
input level
Low audio output
Incorrect input signal type or input level
too low
Check connections and increase/
adjust input level
Weak bass
Speaker(s) are wired out of phase Check (+) and (-) speaker connections
(Observe correct polarity)
No illuminite output
(no lights)
Fuse blown - illuminite output (+12VDC) wire
touching ground
Check or replace fuse
Use 2 amp ATO fuse only
illuminite (+) or (-) wires not connected Check connections at speakers
illuminite connections wired wrong
(reverse polarity)
Reverse (+) and (-) connections
(Observe correct polarity)
illuminite speaker(s) defective or damaged Check/replace speaker(s)