#1
am I supposed to coil tap a pick up when it only has one wire???

not four...

just one....

Sorry if this is a stupid question...I no nothing of electronics.
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#3
If has just the center hot and ground braid then you dont tap it, without taking the pickup apart. And risk screwing up the pickup trying to convert it. If you want coil tap you will have to get a replacement pickup with that capability.