software

I got my humbucker wired to a mnin switch for series/split/parallel. I get all three just fine the problem is. I get hum in some positions of the guitar, I mean straight up, on my knee, up side down, etc. Its really wierd. When I have it on me, just like everyone has it on. I get hum, but when I have it pointing straight up, the neck. No hum at all. I've changed the angle on the guitar and I get hum on some and none on others. I really don't know whats the problem so I opend it up and checked and double checked. I shielded everything that had to do with the humbucker with shrinking tubing and it reduced the hum just a little. But I still get it. I don't know if its that its too close to the pot or to the switch. I do have it grounded and everything around it its grounded to. But I still get that stupid hum. When I play it in clean I get some but its nothing, when I have it in dirty its like I just want to throw the guitar at the amp. Its like this. The humbucker to the on/on/on for the breaking part. Then to the on/on for the positioning. From there to the vol pot and to the 5 way switch. Can anyone help me.

O.K. lets start with the simple 1st. I'm sure your aware when you split
the coil you will get Hum .(Right?) So if I understand this right, You are
getting Hum when coils are NOT split? If this is the case? Double check
your wiring and then retouch all solder joints. You may have a cold joint.
Hope this helps.

What do you mean by cold joint.