It's been awhile but if your neck pickup has a metal cover,I remember disconnecting the cover ground from the pickup itself and running a seperate cover ground from the cover over to one of the pots in order for the 4 way switch to work...Both of my Teles have the 4 way switches that I wired so if you get into a jam,I have the drawing....My drawing is actually a better and revised 4 way wiring that a guy on the FDP sent me...Let me know if I can get ya fixed up?
John