What’s happening with my Fender Jazz?

[Bassgore]

Hey guys.

So... trying to revive an old project bass buildt with left over Fender parts.
Worked pretty good ’til we installed the old Fender pickups from my CS Fender Jazz 64 NOS - 00.

So first - It sounds great but the copper shielding doesn’t work and there is a severe ground problem that results in hizzes and bad buzzing and it feels like the pickups are loaded and angry. When touching the bridge it’s ok silent.

Second - It doesn’t go silent when all pots are turned off... there’s still sound. Quiet but significant.

What am I doing wrong???
I followed the CS Jazz Bass pickup wiring schematic.
Here’s some pics of the debacle...
Really greatful if anyone could save me from turning completely bald and dead inside

 

[Stumbo]

Can you post the CS Jazz wiring schematic?

 

[ricardol]

Where is the bridge ground wire?

 

[Jazz Ad]

There is a contact somewhere between the signal and the shielding.

 

[Bassgore]

The ground wire goes to tone.
It’s the black cable with a copper shielding on it. The one to the left up top on tone.

 

[ricardol]

OK, I see it.
Could it be loose at the bridge side, since "When touching the bridge it’s ok silent."?

 

[Bassgore]

Hm. Maybe. Will try put a little scotch on it

 

[sissy kathy]

Reverse the leads on the neck pickup, and while you're at it put a jumper in from the back of the vol to the back of the others. Practice you soldering skills first.

 

[Bassgore]

Reverse the leads on the neck pickup, and while you're at it put a jumper in from the back of the vol to the back of the others. Practice you soldering skills first.

Thanks... will try.

Just so I’m on the same page...
Change leads on bridge = change pos on black and white...?
(Just a remark... changed the cables due to a brutal phase problem)...but maybe I did something wrong then.

Jumper = small bits of cable that runs between pots?
Back of the pots?... where’s that?
On one of those three small dohickies that’s attached to the pots?

Forgive me for my extreme noobi-skills and comments.

 

[Bassgore]

Can you post the CS Jazz wiring schematic?

Absolutely -

 

[Thumpin6string]

All I see are a bunch of cold solder joints. You need a hotter iron or some additional flux. Until those are fixed, it's pretty much a crap shoot.

 

[dan1952]

There are a ton of sites that show how to solder. The OP should watch a couple of those.

 

[sissy kathy]

Thanks... will try.

Just so I’m on the same page...
Change leads on bridge = change pos on black and white...?
(Just a remark... changed the cables due to a brutal phase problem)...but maybe I did something wrong then.

Jumper = small bits of cable that runs between pots?
Back of the pots?... where’s that?
On one of those three small dohickies that’s attached to the pots?

Forgive me for my extreme noobi-skills and comments.

Q. Change leads on bridge = change pos on black and white...?
A. Yes that.

Q. Jumper = small bits of cable that runs between pots?
A. Yes,

Q. Back of the pots?... where’s that?
A. That is where the white lead you are going to move is presently located.

 

[nnnnnn]

View attachment 3407434

Off-topic, but that's interesting that the diagram describes the pickups as "lead" and "rhythm" - I've never heard those terms used for bass pickup positions before.

 

[Ric5]

 

[Ric5]

 

[I-play-bass]

Also, check the back of the badass to make sure it's grounding there properly. I had to sand the chrome off mine to quiet up my P bass.

 

[Pilgrim]

I agree that many of the soldering contacts look suspicious, especially on the bodies of the pots. I also agree that getting these done well can be challenging.

 

[Bassgore]

Thanks for all tips guys.
Will try to amp up my soldering skills this coming week

 

[Brad Maestas]

All I see are a bunch of cold solder joints. You need a hotter iron or some additional flux. Until those are fixed, it's pretty much a crap shoot.

Agreed. Not nearly enough (or any) flux and lots of lumpy piles of solder. Take your time and do it right.