Have a pick guard and installing wilkinson M series Pickups

[McCreed]

What in general should I be looking at for proper resistances?

In this scenario, I think you'll find that the multimeter will mostly be handy for checking continuity between components or shielding (if you've done any). Essentially following the signal and ground paths and making sure there are no shorts.

As for resistance, you can test your pots just to see where they're operating, but that's more for curiosity than anything else (IMO). Pots (especially budget ones) can have a tolerance of ±20%, eg: a 500k pot can measure anywhere between 400k - 600k ohms.
It sounds like a lot but it's generally imperceptible to what we can hear, or how it genuinely effects the tone.
You can also test your pickups DC Resistance, but again, mostly curiosity unless something is seriously wrong.

[Maverick Wolfe]

In this scenario, I think you'll find that the multimeter will mostly be handy for checking continuity between components or shielding (if you've done any). Essentially following the signal and ground paths and making sure there are no shorts.

As for resistance, you can test your pots just to see where they're operating, but that's more for curiosity than anything else (IMO). Pots (especially budget ones) can have a tolerance of ±20%, eg: a 500k pot can measure anywhere between 400k - 600k ohms.
It sounds like a lot but it's generally imperceptible to what we can hear, or how it genuinely effects the tone.
You can also test your pickups DC Resistance, but again, mostly curiosity unless something is seriously wrong.

Okay, so here we have a picture of the pick guard with the entire setup facing left. Something tells me this switch may have been wired backwards as to what I need for the neck to middle to bridge configuration goes and I might have to fix this tomorrow/later today when I get back from where I need to be at 1400 pacific. If this is so then I'll get it fixed then, I might order a switch to replace this one as this one seems to be of poor quality. on the metal side it has CF inside a circle according to amazon it might be some brand called DZS, if that means anything to you I'd appreciate the knowledge. Should I attempt a trace to see what position is what if possible? I also noticed the old neck says FC-50 and the bridge says something different.