OK, so when the pick-ups were changed the wiring was changed to remove the coil tap as well.
We now know that the guitar wiring has been changed and that both pick-ups have been replaced by a previous owner. And the problems you are experiencing suggest that this was a DIY job rather than by a reputable guitar tech. So there could well be other issues with the wiring.
Swapping pick-ups is relatively straightforward when you know what you are doing. But there are a number of potential pitfalls that can catch you out if you don't. There are no common standards for pick-up wire colours, and there are several different ways to wire humbucking pick-ups.
You need your guitar wiring and pick-ups looked at by someone who knows what they're doing. Because of all the possible variations in how your replacement pick-ups are wound, they need to be identified properly. If you are lucky, they will be labelled, but they need to be removed to find those labels. If they aren't labelled you may not be able to work out for yourself how they should be connected.
Find a reputable guitar tech near you to check and fix the guitar wiring. And if you let us know where you are based (Country and region/city) someone here may be able to point you in the right direction.
Andy
