I'm putting an old 3-wire Quarter Pound neck I've had forever in my Tele with a new Jerry Donahue bridge I just bought. I'm not splitting anything. Do I solder the red and white wires together, and black is ground? Thanks!!
Measure which two wires give the greatest/full DC output; those two will be your hot/ground. You would tape off the remaining "tap" wire, connect it to nothing. This is usually the red wire.