Electronics > Beginners
Help in rewiring guitar pickup (electrical circuit) for additional functions
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Rango:

--- Quote from: rjp on October 29, 2019, 03:00:09 am ---start at the start.

get one humbucker going, experiment with different ways of joining the coils - listen to the results, its obvious when you have them in phase or out of phase.
 
sounds like you are trying to run before you can walk.

--- End quote ---

Thank you sir. Just did that. Here are the results. How do i know where is the start and end of each pickup coil. Which is start and end or north and south like shown in diagram below.

GFS Crunch Pat (Bridge 14k)

Screw Coil -- Red wire - Positive DMM reading

Screw Coil – Black wire - Negative DMM reading

Slug Coil – Red wire – Negative DMM reading

Slug Coil – Black wire - Positive DMM reading

GFS Vintage 59 (Neck 8.0k)

Screw Coil -White wire – Positive DMM reading

Screw Coil -Black wire – Negative DMM reading

Slug Coil - White wire – Negative DMM reading

Slug Coil -- Black wire – Positive DMM reading


rjp:
Slug coil, Positive DMM   is North Start is Black
Slug Coil, Negative DMM is North Finish is White
Screw Coil, Positve DMM is South Finish is Red
Screw Coil, Negative DMM is South Start is Green

you *might* have to swap the screw coil ones around, but thats going to be dead obvious if you wire up the first humbucker by itself and test how it sounds with the following

Black -> direct to plug output
White -> connect to red
Green -> direct to plug ground

ignore all the pots, ignore the other humbucker, just run the single humbucker billy gibbons style straight to the plug and confirm its loud and confirm the chart above - switch the screw coil wirre around if its thin and weak.

 
Rango:

--- Quote from: rjp on October 30, 2019, 01:59:23 am ---Slug coil, Positive DMM   is North Start is Black
Slug Coil, Negative DMM is North Finish is White
Screw Coil, Positve DMM is South Finish is Red
Screw Coil, Negative DMM is South Start is Green

you *might* have to swap the screw coil ones around, but thats going to be dead obvious if you wire up the first humbucker by itself and test how it sounds with the following

Black -> direct to plug output
White -> connect to red
Green -> direct to plug ground

ignore all the pots, ignore the other humbucker, just run the single humbucker billy gibbons style straight to the plug and confirm its loud and confirm the chart above - switch the screw coil wirre around if its thin and weak.

--- End quote ---

Thank you but this doesn't seem right. Correct me if i am wrong but you can't run plus into minus and expect electrical curent to be passed onto next circuit. That's what you did.

This is a humbucker when you combine two single coils into one they must be negative or positive but not + into -, i think when one coil is combined with other forming dual coils circuit hence humming/humbucker.

This is what i have currently. I think this may be right. If someone can confirm i would be greatly appreciative. If i'm wrong please point out what's wrong with it.

I THINK FIRST COIL THE SLUG COIL IS ALWAYS POSITIVE AND BOTTOM IS ALWAYS NEGATIVE. I will post the picture in little bit as i'm not home right now.



GFS Pickups Rewire to SD Pickups with SD corresponding colors.

GFS Vintage 59 Humbucker (Neck 8.28k) – WIRE COMING OUT TO RIGHT – NECK SD PICKUP PICTURED

Slug Coil - White wire – Negative DMM reading – North Start (HOT OUTPUT) – BLACK WIRE

Slug Coil -- Black wire – Positive DMM reading - North Finish SERIES LINK – WHITE

Screw Coil -White wire – Positive DMM reading – South Finish SERIES LINK - RED

Screw Coil -Black wire – Negative DMM reading – South Start – GROUND – GREEN


GFS Crunch Pat Humbucker (Bridge 14.63k) -- WIRES COMING OUT TO LEFT

Slug Coil – Black wire - Positive DMM reading – North Start (HOT OUTPUT) – BLACK WIRE

Slug Coil – Red wire – Negative DMM reading – North Finish SERIES LINK – WHITE

Screw Coil – Black wire - Negative DMM reading – South Finish SERIES LINK – RED

Screw Coil -- Red wire - Positive DMM reading – South Start – GROUND – GREEN
rjp:
this is an AC circuit, not a DC one - the plus and minus are the first oscillations of the AC curve, so if you conect plus and minus they will subtract from each other and make a thin out of phase sound.

 do the simple hotrod humbcuker -> jack thing, instant confirmation of correct or fail, instant lesson on how those readings turn into wirings :)

no need to guess - by knowing the polarities you can make sure both humbuckers are the same and the signal adds instead of subtracts.
Rango:
So first pickup to the down of DMM is neck 8.2k ohm pickup. If you notice I think this is normal operation of humbucker where middle wires are combined. I believe that's two negatives or two positives.

Second pickup is bridge 14.0k ohm in humbucker configuration. The Ohms check out but i'm not sure about polarity. Both Humbuckers currently have positive on first coil (first wire) and negative on second coil (4th wire). I

If i get polarity wrong on even one wire then entire MOD will NOT work. At this point all i need to identify where is north start ,north end, south end and south start with correct polarity.

I've measure the polarity and posted wires.

GFS Crunch Pat (Bridge 14k)

Screw Coil -- Red wire - Positive DMM reading

Screw Coil – Black wire - Negative DMM reading

Slug Coil – Red wire – Negative DMM reading

Slug Coil – Black wire - Positive DMM reading

GFS Vintage 59 (Neck 8.0k)

Screw Coil -White wire – Positive DMM reading

Screw Coil -Black wire – Negative DMM reading

Slug Coil - White wire – Negative DMM reading

Slug Coil -- Black wire – Positive DMM reading

DSC_0184 by Sefyu, on Flickr

DSC_0185 by Sefyu, on Flickr

I think in wiring most if not all humbuckers slugs are always up and screws are always down. You can flip them later but you can not flip the wires. I think this example is showing Neck pickup.

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