I haven't done this for quite a time, and my brain feels a little rotten. Feel free to correct anything of this if anyone knows of a better way. This is for "hot".
1)Remove old bridge pickup.
2)Expose and cut the new pups wires to fit snuggly under pick guard.
3)Take humbucker and screw it in the bridge position. You might have to enlarge the pick guards bridge pup's hole with a knife, as even single coil humbuckers are a little thicker, not much though.
4)Twist and tape the RED and WHITE wires together.
5)Then the black goes where the black did with the single coil pup, the green goes where the white did. Thats how I've always done it.
6)When you solider them, make sure you practice a few times with junk wire or something as it can be tricky the first time. Make sure you feed the wires through the switch holes and then solider them.
7)Grounding, at this point I plug the guitar in with a little amp distortion going. It will be noisey as hell when its not grounded, then find an idea place to ground it. You know its grounded when the buzzing and noise stops.
Again, I'm no guitar tech and would actually like it if someone posts a better way.
