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MP6612i
27
TROUBLESHOOTING
Problem Cause Corrective Action
Does not operate
(display does not
light)
No power to yellow
wire; no power to red
wire
Check connection with test
light; check vehicle fuse with
test light
Inline fuse blown Replace fuse
No power to unit Inline fuse blown Check/replace fuse
No speakers oper-
ate (display lights
normally)
No speaker harness,
speakers not con-
nected
Connect speaker harness;
check speaker wires
Not all speakers
operate
Incorrect splices or
connections
Check all splices and connec-
tions
Speaker wires shorting
to chassis ground or to
each other
Check splices; insulate all
bare wires
Blows fuses Power wire shorting to
ground
Make sure wire is not pinched
Speaker wires shorting
to ground
Make sure wire is not pinched
Incorrect fuse; fuse too
small
Install fuse of correct rating