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Grounding problems

 
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wadeaminute
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Joined: 29 Aug 2010
Posts: 340

PostPosted: Wed May 08, 2013 4:18 pm    Post subject: Grounding problems Reply with quote

I just rewired my JR Super-Sonic. It has two humbuckers - a Dimarzio YJM strat-sized 4 wire stack and a a GFS Mini Crunchy (4 wire). I wired it with a volume and tone and a 3-way. And a momentary. It works just fine except for what I assume is a grounding issue. It buzzes / hums when plugged in if I am not touching the strings or any metal parts. If I turn down the volume or tone the buzz goes away. No wires are loose. All wires are in place as per a Seymour Duncan wiring diagram. The ground wire from the cut-off tele bridge goes to the tone pot.

Ideas?

Thanks in advance


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cur
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Joined: 18 Jan 2009
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PostPosted: Wed May 08, 2013 4:30 pm    Post subject: Reply with quote

Is the bridge grounded? That is the usual problem. check continuity
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Dillon
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Joined: 20 Apr 2006
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PostPosted: Wed May 08, 2013 4:49 pm    Post subject: Reply with quote

If it's not what cur said then you have a bad ground somewhere. Can you give us more details on how you wired it? Post a picture of the wiring, or draw a diagram, if you can. DiMarzio wire colors are typically not the same as SD wire colors so there might be something wrong there. I think the GFS is the same though. Does the noise occur in all positions? And is the pickup cavity shielded at all?
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Thomas
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Joined: 09 Oct 2008
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PostPosted: Wed May 08, 2013 11:41 pm    Post subject: Reply with quote

If you're like me, the pick guard might need some extra shielding. I am a static filled mother fucker.
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DGNR8
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Joined: 30 Sep 2006
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PostPosted: Thu May 09, 2013 12:41 am    Post subject: Reply with quote

Any pics?
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wadeaminute
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Joined: 29 Aug 2010
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PostPosted: Thu May 09, 2013 12:48 am    Post subject: Reply with quote

Pickguard is shielded.

I used this diagram. The pickup codes were sorted out properly.

SD wiring diagram

I took it to a tech today, and his meter says that I did everything right, grounding wise. He says that this sort of minor hum is normal and no big deal.

I also tried putting a brand new switchcraft jack on the guitar. No change.
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