GOD I HATE WIRING.....
That's OK, but there's no need to be formal. I answer to "Ron" except when I'm being worshipped. Possibly shouldn't mention it here, it seems heretical, but the Seymour Duncan (wash my mouf out wiv soap!) site has some very good schematic diagrams. Pick the one that's closest to your Westie, bearing in mind there might be colour differences, and rewire as per the schematic. It may not be identical to what you had but it will undoubtedly work. Sometimes a rewire's a lot easier than sorting out dodgy wiring. Wire you can get from Allparts, among others