Well, I thought of that but it only confuses me more. I tried this method with my Jackson, worked great. Then I tried it with my Squier '51 and the oddest thing happened.

My bridge pickup comes back as dead, even though it works fine.
My bridge pickup with the coil tap pulled shows the proper ohmage.
My neck pickup comes back dead.

I tried it with the pickup pulled out before and couldn't get a reading either. I'm not sure what all of this means.