77 Les Paul Custom Ground Issue

Sunnyevan

Member
Messages
355
My LPC neck pickup works flawlessly, but the guitar is very noisy on the bridge and middle. The volume knob doesn't completely mute the bridge pickup either.

I can mute the excessive noise/hum by touching the jack plate or the pickup itself, so obviously theres a grounding issue. But I can't see where there is a disconnect in the wiring.

Here's a photo of the wiring:

 

bob-i

Member
Messages
8,774
I had a 77 LP custom that had the metal ground plate as well. The ground on the pots is just the pot screwed to the plate. I had the same issue that I solved by removing the metal plate and soldering the ground wires to the back of the pots.

good luck
 

70 Mach 1

Silver Supporting Member
Messages
5,043
That's way too sloppy to be factory wiring. I would touch a soldering iron to all the grounds and pots and Reflow it all
 

MusicalMan

Member
Messages
154
If I were to start doing ANYTHING, I would first get a multi-meter and figure out what isn't grounded. Check the bridge, input jack, etc. If you can verify that you have somewhere with "infinite" resistance, then you found your culprit. If you just want to clean up the solder job, that's OK, but may not get you where you want to - i.e. addressing the root cause of your issue.
 

a person

Member
Messages
248
It sounds like it is only happening when the bridge pickup is selected. So start by chasing down the grounds for everything in the bridge pickup's signal path. Make sure there is actually a connection between the bridge pots and that metal plate (my guess is that's where your problem is). SOMETHING isn't getting grounded properly. You just need to find it.
 




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