I just finished installing SD Jazz in the neck and Little Pearly Gates in the bridge of my American Telecaster. I'm using a 4-way switch and I followed the SD diagram for Humbucker, Humbucker with 4-way switch for Telecaster. The room I play in has a dimmer switch in the light and when it's turned on I get a buzz/hum. This is my first real experience with humbuckers, is this buzz to be expected or do I have a ground issue? I went back over my solder joints and they all feel strong. Thanks.