SWRA411 - ©2012 Stillwater Designs
9-27-12
Page 7 of 8
Symptom
Possible Cause
Solution
No Subwoofer Output
Fuse not installed in inline
fuse holder on subwoofer
and/or amp harness
Install fuse(s) into fuse holder(s). Refer to
instructions for correct placement
Low battery voltage
Recharge the battery
Negative battery cable not
connected
Reconnect negative battery cable
Power wire connector not
connected to body harness
Connect power wire to body harness. Check
for loose connection
Ground wire not grounded
properly
Check ground wire with voltmeter to insure it is
a good ground
Signal input connector not
connected properly
Connect signal wire of subwoofer harness to
signal wire of amplifier harness or factory
speaker wire depending on application.
Check for loose connection
Balance or fader controls not
set to neutral position
Set balance and fader control to center
settings. (only affects stand alone subwoofer
kit)
No low frequency
information in music
Test with several different songs
Subwoofer harness not
properly/completely
connected to subwoofer.
Securely fasten both of the connectors on the
subwoofer harness to the subwoofer. Check
for loose connections.
Radio not coming on
Radio connector not
properly/completely
connected
Check radio connector to insure it is
completely seated
Blown radio fuse
Refer to owner's manual for radio fuse location
and value
Low battery voltage
Recharge the battery
Radio comes on, but no
sound from any speakers
Fuse not installed in inline
fuse holder on amplifier
harness
Install fuse into fuse holder. Refer to
instructions for correct placement
Radio connector not
properly/completely
connected
Check radio connector to insure it is
completely seated
Ground wire not grounded
properly
Check ground wire with voltmeter to insure it is
a good ground
Low battery voltage
Recharge the battery
