So, I used to play guitar, quite a lot, and lost interest about 15 years ago. I still had the guitars in the closet, and pulled one out today. It took some false starts, but I finally realized that the bridge humbucker seems to be dead. The fretboard pickup and single-coil seem fine.
The guitar is an 80s Electra Phoenix strat ripoff (I think its this model). Its unusual in that the three “pots” all have a switch in them. You pull up on the pots, and you get various combinations of the 3 pickups, in addition to the pickup selector switch control (yeah, I’m still trying to remember exactly what those switches did, but they seem to activate the center single-coil sometimes).
So: the silent pickup could be a) the pickup, b) the wiring (looks intact on inspection) or c) the pot or pot switch is busted. The bridge pickup control was loose, but the wires look good, I just tightened the nut that holds it on.
So: what’s a good way to troubleshoot this, short of unsoldering the whole thing and dismantling down to wood? If its the pot, how hard is it to find one with a switch on it (the switch seems to be double-poled, e.g. four solder posts, vs the 3 other posts for the pot resistor).