1994 Carvin M22SD pickup wires HELP!

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K626
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1994 Carvin M22SD pickup wires HELP!

Postby K626 » Wed Apr 01, 2015 2:22 am

Okay I have a 1994 Carvin M22SD pickup. I have used it in many guitars the wires are short and I fear the pickup may be dying.

Help me out here.

Image

• I know that the bare and black wires that are wound around each other are ground.

• I am assuming the red wire with the white lead is the coil splitter........I've never used it, multimeter gives no reading.

• Is the black wire below the white the "green" wire? What should I do with this? At one point I thought this was hot for some reason. Multimeter gives no reading

• The red on the south pole is reading about 7.12 ohms......I am assuming this is HOT! The reading seems really low since it is an M22SD with a supposed ohm rating of 13.9 or so.

This originally was from a Carvin DC127 that I still own and it was wired from the factor in 1994 into an active board. I had to many issues with the board and ripped it out shortly after purchasing it and just went passive. Over the years of taking this pickup in and out of guitars I've cut and cut and cut wires.

Just to clear some things up:

1. This is a Carvin M22SD, supposedly with an output of 13.9 ohms why am I getting a reading of 7.12 ohms? Or is this correct?

2. Do the other wires........white and "green" need to be soldered together if I am not using them? I've never done this before, they've just been taped off and in fact the black one, which I thought was hot at one point has just been sitting there.

3. I know this is an ignorance thing, but in touching the "green" and white wires I get no ohm reading......not sure that I should. ???

The bottom line. I just need to use this pickup in a guitar and I want to make sure I am getting the proper output (13.9 ohms).

Thank you for any help!!!

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re: 1994 Carvin M22SD pickup wires HELP!

Postby K626 » Wed Apr 01, 2015 2:50 am

Okay I just watched the following video HERE and learned a lot.

I went and did some multimeter testing.

I separated the black and bare wires. Testing the black and red on the bottom gave me a 7.12ohm reading.

Testing the black and red/white wires on top gave me a 6.9 ohm or so reading.

In connecting the south red with the north black and testing the red north (+) with black south (-)......I am now getting a 13.96ohm reading!!! WOO HOO!

Is there anything I might be missing?

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re: 1994 Carvin M22SD pickup wires HELP!

Postby Coda » Wed Apr 01, 2015 5:10 am

Thanks for posting that video, it was really enlightening.

Good luck with your installation!
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re: 1994 Carvin M22SD pickup wires HELP!

Postby ElfDude » Wed Apr 01, 2015 7:45 am

Looks like you got it figured out. 8)

Yeah, that green wire didn't come along until later.
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re: 1994 Carvin M22SD pickup wires HELP!

Postby K626 » Wed Apr 01, 2015 9:48 am

Cool! Gonna go put some fresh extension wires on and solder her up!

Thank you! :D

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re: 1994 Carvin M22SD pickup wires HELP!

Postby K626 » Wed Apr 01, 2015 11:31 am

Okay, I think I have something backwards. :(

I have my 13.6ohm reading..........however it seems like the pickup is only using single coil??? Sound wise....

Any thoughts?

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Re: re: 1994 Carvin M22SD pickup wires HELP!

Postby ElfDude » Wed Apr 01, 2015 11:35 am

K626 wrote:Okay, I think I have something backwards. :(

I have my 13.6ohm reading..........however it seems like the pickup is only using single coil??? Sound wise....

Any thoughts?


With the pickup selected and the guitar plugged into an amp, try tapping on the polepices of each coil lightly with a screwdriver. If the coil is active, you'll really hear the tap through the amp. If not, it'll be much quieter.
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re: 1994 Carvin M22SD pickup wires HELP!

Postby K626 » Wed Apr 01, 2015 11:57 am

I am getting both sides north and south......but it sound really thin. I have another guitar with the same pickup and it's beefy through the same amp. ???
Last edited by K626 on Wed Apr 01, 2015 12:09 pm, edited 1 time in total.

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Re: re: 1994 Carvin M22SD pickup wires HELP!

Postby ElfDude » Wed Apr 01, 2015 12:07 pm

K626 wrote:I am getting both sides north and south......but it sound really thin. I have another guitar with the same pickup and it's beefy though the same amp. ???


Hmmm... I was about to say that maybe it ended up wired oin parallel instead of in series. Buit that wouldn't be the case if you're reading over 13 K Ohms. :think:
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re: 1994 Carvin M22SD pickup wires HELP!

Postby K626 » Wed Apr 01, 2015 12:13 pm

All I can think of now is that the pot is the issue. At least I hope so. :?

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re: 1994 Carvin M22SD pickup wires HELP!

Postby K626 » Wed Apr 01, 2015 12:38 pm

I changed out the pot with one I know works......and still the same issue. Now I'm really confused.

:think:

Perhaps something is backwards on the pickup?

I soldered the red south wire to the north black wire.

Red north is my hot and black south is my ground along with the bare wire.

Is this correct? According to the picture I first posted?

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re: 1994 Carvin M22SD pickup wires HELP!

Postby ElfDude » Wed Apr 01, 2015 12:55 pm

So you're using red for hot and black for ground and the white wire is connected to nothing?
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re: 1994 Carvin M22SD pickup wires HELP!

Postby K626 » Wed Apr 01, 2015 12:58 pm

Red north is white.........I have since taken that white lead off of the red. So "white" is used.....it is just red north now ;) "white" is HOT!

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re: 1994 Carvin M22SD pickup wires HELP!

Postby K626 » Wed Apr 01, 2015 1:11 pm

Now that I think about it........when this pickup was working in tip top shape I was not using white it was taped off and just hanging. Hmm? Now I'm really confused. lol.

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re: 1994 Carvin M22SD pickup wires HELP!

Postby K626 » Wed Apr 01, 2015 1:15 pm

Should I make a lead off of the red south and black north as one lead for hot? Because technically "white" is the coil splitter, if that is active then it is technically single coil. ???

That doesn't make sense because black is ground....HELP!
Last edited by K626 on Wed Apr 01, 2015 1:22 pm, edited 1 time in total.

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re: 1994 Carvin M22SD pickup wires HELP!

Postby ElfDude » Wed Apr 01, 2015 1:22 pm

Well... according to this sheet of instructions from Carvin which was printed back when the M22 pickups had no green wire, red was usually hot, black was ground, and if you weren't coil splitting the white wire was to be taped off and not used.
http://www.carvinmuseum.com/decade/images/carvinpickupwiringschematic.html
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re: 1994 Carvin M22SD pickup wires HELP!

Postby K626 » Wed Apr 01, 2015 1:24 pm

Okay......so could it be that the two negative black wires need to be spliced together and red on the south is hot? Don't use "white" which is red north?

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re: 1994 Carvin M22SD pickup wires HELP!

Postby K626 » Wed Apr 01, 2015 1:27 pm

Maybe I yanked off the black north wire from the black south when taking the pickup out.

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re: 1994 Carvin M22SD pickup wires HELP!

Postby K626 » Wed Apr 01, 2015 2:33 pm

HERE IT IS! In desperation I yanked my other M22SD pickup from another guitar.....same era.....and this is how it goes:

Both red wires are soldered to a lead of white wire! So both red are in fact WHITE!

North black is wired to a red lead.......which makes north black HOT.

South black is ground along with of course the bare chassis wire.

I'll hook my other pickup as such and take a reading for anyone that is interested in the aftermath of this. lol. :mrgreen:

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re: 1994 Carvin M22SD pickup wires HELP!

Postby K626 » Wed Apr 01, 2015 3:25 pm

Found out why I have always loved this pickup. After correct wiring hook up it reads at a solid 14.22ohms!!! Just a bit overwound......SO LOVELY!

At any rate, got it all hooked up and the thing screams!

Thank you to ElfDude for trying to make heads or tails of this.

Take care!

:mrgreen:


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