Wiring single coil pickups 1 volume 4 tones

Hi Richard and welcome!
When you are allowed to post, some pictures would help a lot, there were 3 versions of this bass.
Click here: Scroll down for Thunder II models.

New members are required to wait 7 days as an anti-Spam measure, but if you wish, send me your pix and I'll post them for you. Click on the link under my avatar.

Meantime, be aware that loud humming is usually the result of a bad ground (perhaps a loose solder joint). First place to look is the jack input. The second major cause is simple corrosion in the pots. That's usually cured with a few squirts of contact cleaner. Before you go gutting everything I'd check those items first. It could save you a major rewiring.

Thanks Barry!!

The diagram here isn't an exact match because I dont have a phase shift. Everything else is the same.

It's a passive set up.

Two tone knobs. One volume knob. The ton pots are stacked. Check it!

I have the Thunder II version 3

You say you have "stacked" tone pots? My understanding is that "stacked" pots are one on top of the other with the top knob being slightly smaller than the bottom one. Do you mean your bass has push/pull switches on the tone pots? Because that is a common Matsumoku thing; proper stacked pots are not... well, I've never seen them on a Matsumoku guitar!,

richardempty wrote:I have the Thunder II version 3

I volume, 2 PEQ tone controls.

PEQ = center dentent full humbucker.
Turn anti clockwise from detent = bass
Turn clockwise from detent = parallel

Both pickups are humbuckers= 4 wires each. Your Fender one's are single coil pickups.

Stacked pots look like this, yes? PEQ tone controls.

There we go.

corsair wrote:There we go.

Your thinking of the middle knob in the photo below, stacked bass/treble.
  

Yeah; that's the one!! I've seen them on a guitar somewhere - can't remember where or when now - but never on a Matsumoku guitar, though I think maybe some of the top end stuff may have been so equipped... the likes of the ST1512??

...later

See here... it has stacked pots!!

http://www.matsumoku.org/ggboard/download/file.php?id=3478&mode=view

Thanks for that Damian.
Some pix from richardempty

Control Cavity:


Yup, PEQ:


Schematic sketch:



And here's a little more (marketing) info on the PEQ circuit: LINK

Firstly I'd get rid of all that kitchen foil stuffed in there. Could cause a short. Might even be the problem.

The wiring diagram is for a Thunder II passive 6 string, should know I drew it.

Wonder what happened with this guit?.... ...more kitchen foil...

That's the first time I've seen cooking foil used in a guitar cavity.

On the plus side it should help communications with the Mother Ship in high orbit.