5 way Rotary to McCarty with push pull conversion

Discussion in 'PTC - PRS Tech Center' started by pauloqs, Feb 25, 2019.

  1. pauloqs

    pauloqs PRS McCarty

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    I have a 2008 Custom 22 loaded with Dragon II. It has the 5-way rotary switch. I've been thinking of changing it to the McCarty wiring with a push-pull tone pot for coil tapping/splitting. I think the current wiring I have follows this diagram:

    https://www.prsguitars.com/documents/prs_custom5wayrotary_pre_2007.pdf

    Is the following diagram what I have to follow?
    https://www.prsguitars.com/documents/custom3waytoggle.pdf

    What's confusing to me is that I only remember seeing 3 wires on each pickups, red, white, and black (will double when I get home). Also that the Ground for the Neck pickup is labeled as Black in the diagram and the Hot for the bridge pickup is also labeled as Black. Does this mean I need to solder the black wire of the Bridge pickup to the top of the volume pot and have a wire coming from the same solder joint on top of the volume pot that is then soldered to the top right connector of the 3-way toggle switch? Why would that make the black wire on the bridge pickup hot? Am I missing something? Anything else I should be aware of? If anyone has another wiring diagram, that'd be helpful as well. Thank you.
     
  2. gush

    gush She said "huge bag of dibs".

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    They are wired for reverse polarity for the rotary switch. That's why the wire colors aren't the same for both pickups.

    For the 3 way switch put hot where you are supposed to and ground where you are supposed to regardless of wire color.
     
  3. pauloqs

    pauloqs PRS McCarty

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    I think I figured 95% of it. The source of my confusion was that I thought the bridge ground that gets connected to the top of the volume pot was the bridge pickup ground. However, it is the ground that goes to the actual bridge, not the pickup, that goes to the top of the volume pot. What I still don't know what to do with is the bare wires from the pickups and the output jack. Each pickup has a a bare wire, a black wire, a red wire, and a white wire. The output jack has a black wire (I'm assuming it's the hot), and a bare wire (I think that's the ground). All the bare wires from pickups and output jack are currently connected to the top of the tone pot. These bare wires are not depicted in the 5-way rotary diagram (https://www.prsguitars.com/documents/prs_custom5wayrotary_pre_2007.pdf). What should I do with these bare wires from pickups and output jack?
     
  4. gush

    gush She said "huge bag of dibs".

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    Those go to ground. Usually to the back of one or both of the pots. Just don't get crazy with heat on those or you'll be changing them out too.
     
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  5. pauloqs

    pauloqs PRS McCarty

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    Oh I see. That’s what I suspected, but wanted confirmation. It’s just going to get very crowded on top of the volume pot, because I’m going to install a push/pull tone pot and normally those don’t have space on top of them for grounding.
     

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