Wiring issue: guitar sounding muddy + tone pot not working

vyen

New member
Hi guys,

Recently I picked up a strat copy (excluding the guts, only a rusty bridge) at a flea market for next to nothing. I gave it some love, cut out a custom pickguard and wired it with 2 humbuckers I had kicking around (Duncan Designed HB101n and HB103b), just as a fun little project.

Besides having changed out pickups in a couple of guitars, I'm fairly new to the wiring thing. I've basically used this wiring diagram, except I've used an import 5 way blade instead of the Fender type switch.

The issue I'm having is that the guitar sounds very muddy and dark, like when the tone knob is turned all the way down. But the tone knob is not even working; it does not change the tone, but instead turns off the volume when turned 95-100% down. I've wired it like in the diagram above, but with a 22nF capacitor. I've triple checked every connection, rewired most of it and also tested with tapping the pole pieces while the pickguard was laying on its back, to check if the issue had anything to do with wires/connections touching each other inside of the guitar - same thing.

The diagram shows the cap soldered with one leg to the middle lug of the tone pot and the other to ground. The rightmost lug (if you're facing the side with the lugs) is soldered to the back/side of the pot. That's how I did it also.
Later I found this diagram, which shows the capacitor connected to a different lug than the one with the wire from the volume pot. What is the difference between these methods?

I've dug up many threads with similar issues, but could not fix it. I don't think the cap is bad, because it seems to be bleeding highs all the time.

Any thoughts?
 
Re: Wiring issue: guitar sounding muddy + tone pot not working

We need pictures of your actual wiring. Also what kind of pots are you running? Did you double check their values with a meter?
 
Re: Wiring issue: guitar sounding muddy + tone pot not working

The pots should be 500k. I will buy a multimeter asap to check them and the wiring.
Here is a picture of my amateur wiring with cheapo parts:)

morris_wiring.jpg
 
Re: Wiring issue: guitar sounding muddy + tone pot not working

Looks like the tone pot capacitor and lead from volume to tone are both on the middle lug? This is incorrect. (And is like having a tone pot on 0) Move the lead to the outside lug of the tone pot. Also, make sure the outside lug of the tone pot is not soldered to the case. (Was it used previously as a volume pot?) Also I'd shorten the leads on the tone cap, it could ground out on something when you stuff the pickguard back on.

EDIT - that first diagram is strange. I'd do the tone control from the second diagram.
 
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Re: Wiring issue: guitar sounding muddy + tone pot not working

Looks like the tone pot capacitor and lead from volume to tone are both on the middle lug?
Yes, that is the case. But this is also shown on the wiring diagram from SD, unless I'm seeing it wrong? So I followed this diagram and connected them both to the middle lug. I will try it the other way tomorrow and post back if it works. The pots, switch and capacitor were all new, by the way.

Thanks for the advice!
 
Re: Wiring issue: guitar sounding muddy + tone pot not working

I think for that first diagram the capacitor should be making the connection from the volume pot to the tone pot (similar to the way some Les Pauls are wired). You could try that too.
 
Re: Wiring issue: guitar sounding muddy + tone pot not working

I've rewired it according to the other diagram and it worked! Thanks!
 
Re: Wiring issue: guitar sounding muddy + tone pot not working

But this is also shown on the wiring diagram from SD, unless I'm seeing it wrong?

:18::lmao::banghead:

OMG. You are seeing it right. Don't use current Duncan diagrams from the web site. Some contract designer, who clearly does not know electronics, redid them to make them prettier and most all of them have 'issues.'
 
Re: Wiring issue: guitar sounding muddy + tone pot not working

Could work a bit on your soldering skills. Just saying.
 
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