wiring problems in Les Paul

[druz15]

just put a set of calibrated Black Dogs in my '79 Greco Les Paul.
Got 4 con wiring, and a push-pull volume pot for the bridge pickup, wired so that pulling pot out switches phase of the bridge
pickup so can get out of phase tone in middle position.
Basically I wired it like this
https://bareknucklepickups.co.uk/main/downloads/schematics/general/humbuckers/2_hum__2_vol__2_tone__4_con__3_way_toggle.pdf
but substituted the bridge pup wiring for this
https://bareknucklepickups.co.uk/main/downloads/schematics/profiles/humbuckers/1_hum__4_con__pushpull_pot-phase_reversal_with_another_hum.pdf
(except rather than middle lug on pot going to output it goes to selector switch)
I also swapped the green .022uf caps for Orange Drop .047uf

The bridge pickup works and sounds fine, but the neck pickup is extremely weak (as in sounds like the volume is on about 1/10). It has signal, it's just very weak, almost inaudible. I've double checked the wiring, resoldered the neck pickup wiring joints, and gone through the whole circuit with the multimeter, and nothing seems out of the ordinary so I'm not sure what's the problem. Bridge grounding wire is soldered to back of neck tone pot.
Is it possible that my schematic subbing is not right and I need to change something to get it working, or is there something else I could check?
My last resort is going to be soldering neck pup straight to output jack to check the pickup isn't faulty, but I'd rather makes sure everything else is fine before I do anything like that.

This is my first time swapping pickups, but I'm not a noob with a soldering iron or anything, have built several pedals and handwired my own tube plexi head so I know what I'm doing.
Any help would be appreciated

[frankus]

maybe put up some pictures of the wiring.

it could be there's stray earth wires shorting the signal or a dry solder joint...

[darkbluemurder]

Just to check that it's the pickup and not the associated wiring, solder the bridge pickup's hot wire to where the neck pickup's hot wire is now and vice versa. Does the neck pickup still sound weak - then the problem is with the pickup. Does the bridge pickup now sound weak and the neck pickup fine - the problem is with the wiring.

Good luck,
Stephan