i installed a emg 89 and a black in my guitar
but i and getting a lot of feedback from the guitar
is it a probable with the grounding

my guitar has a 1 volume with a 3 way switch
it See's that the 89 is find no feedback but the
blackout is giving the feedback,and when i turn the volume
down to 0 the 89 has no sound but the blackout still can be
heard softly