I've been reading a lot and am about half way to getting where I want to be. I'm a newer guitarist and want to mod a Godin freeway classic I have (right now HSH with a 5 way, 1 tone, 1 volume) so I can choose between series/parallel on the humbuckers, get the coil taps for the bridge and neck, and have the option to go for the bridge and neck humbuckers only (basically have all the stock pickup combinations with the options of choosing series/parallel and coil tapping in all stock combos). I understand I'll have to put in a few switches, swap out to push pull pots, and go for a superswitch or something to get this done. My goal is to get a guitar where I can experiment with as many combinations as possible so I can learn the difference between each setup. Any help would be appreciated.
I've been on 1728, checked out Seymore Duncan, gear page, the DiMarzio site, and of course google and this site. Like I said I can come up with about half the wiring myself, but short of hooking the pickups to a computer I'm not sure how to get this done. I'm a little concerned about cavity shielding and having some ground plane issues once it's done, so if there are any electrical engineers that could point me in the right direction that would also be helpful.
As to shielding, or not shielding, it's a matter of preference. It may help reduce noise somewhat when you're in single-coil operation. There's plenty of info hereabouts on the topic.
As for the wiring, how is the 5-way switch wired currently? Does it already split the coil(s) of one or both HBs at positions 2 and/or 4?
For coil splitting, a single DPDT switch (which could be a push/pull on one of your pots) could be used to cut both HBs to single coil at once. If you don't have the B + N on the 5-way, you don't really lose any options- either the bridge HB will be cut when it is selected by the 5-way, or the neck HB will be, but if they're never on together then you're not missing out on the "Both HB split" anyway.
If you want to split each HB individually, then you'd need two switches. Two more will be needed for the series/parallel switching, one for each pickup. However, one option I would suggest, to minimize the number of switches you have to add- you can use a DPDT On-On-On switch, one for each HB, to switch that HB between series/parallel/coil cut. These can be had as a mini-toggle style switch.
Whether you will need a Superswitch or the like will depend on what pickup switching you have now, and whether you want to retain or change that. If you're happy with the current selections, there's probably no need for a new lever switch.
As for a diagram, I'll have to hunt around a bit to see what we have. It may take me a bit, but we'll come up with something for your consideration.
so I can choose between series/parallel on the humbuckers, get the coil taps for the bridge and neck, and have the option to go for the bridge and neck humbuckers only (basically have all the stock pickup combinations with the options of choosing series/parallel and coil tapping in all stock combos).
I've not had my hands on a Freeway Classic so I'm not 100% certain if the HBs have 4-wire plus ground cabling. It's probable that the selector switch is some variety of a standard 5-way. But since this is a Superstrat style guitar, removing the rear cover for the control cavity and taking some pics will tell us a lot about the starting point.
Also, you could use a compass to determine the magnetic polarity of each of the 5 coils. We need to know the layout so as to determine which pairs will give us hum-canceling. If there's a particular pair you feel you must use together, and they don't hum-cancel, so be it. But getting hum-canceling combinations is something worth doing, when possible.
You'd be drilling a lot of holes for mini-switches with a design that can achieve ALL the possible combinations. But if we only have one push-pull and a Superswitch that already puts us at 10. You could have five selections. The push-pull could be used to switch from Parallel to S-mode (series or single, depending on the particular selection).
If Newey can find an existing wiring that suits your needs, that would be the easy and direct path. A longer path would be to have a rather long dialog about what combinations you want and whether to have any out-of-phase capability. We might look at one of the three versions of the Strat-o-Various design as an overall stategy in a new design. But the development time might be rather long. Could be in weeks rather than days, depending on your current skills.