He couldn't explain why this was the case and I was pretty confused too. I've bought the correct switch and everything and he swears that he's used the correct diagram to set it up. Even going so far as to emailing the place where I bought my switch from.
I have installed a P90 into the neck of the guitar and it works perfectly in all positions. I have one of two choices at this point - I either forget the series/parallel mod and revert the guitar back to the standard 3-way switch between Bridge, Bridge+Neck and Neck. Or I try and do my own homework, starting by asking some folk on here if they can help me out. Then take it back to the guy at the shop and hope that he doesn't get insulted by me making alternative suggestions as to why he hasn't been able to set this mod up properly.
I could try sorting this out myself but I haven't got the first clue about wiring diagrams or soldering so I am just asking for some help in finding out why this hasn't worked. I've used the guy plenty of times in the past and he's always did a great job so I have no reason to question his commitment to getting the job done.
Any help is greatly appreciated, as always.
Thanks!
![Smile :)](./images/smilies/icon_smile.gif)