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Ground wire from bridge

What about the volume and tone controls they still don't work.

I stared at your photo for a while. I'm not really sure where the wires connect to your jack though. If your volume and tone pots aren't working, the first thing I would check is a good solid ground to them.
 
old_emg_p_wiring.jpg
 
Also, check this spot. It looks like the signal wire from the pickup is stripped back too far, and it may be touching the middle terminal on the pot. If it is, it would bypass the controls.

Screenshot 2021-12-11 9.52.22 AM.png


It could well be the control ground though as @Reedt2000 pointed out - hard to tell without seeing where all the wires go when they leave the cavity. The pot cases themselves don't actually need to be grounded but the ground terminals on the pots need to be grounded - i.e. connected to the ground terminal on the jack.
 
Check around all the pot terminals, actually. Make sure nothing is touching something it's not supposed to be. A pot terminal bent down a little such that it touches the copper foil, or a lead bent a little so it touches something else, can cause issues like this.
 
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I could be wrong but it appears you have a solder bridge between what should be a signal lead and the potentiometer case. Also, it might not hurt to put some electrical tape between those potentiometer solder points and the shielding unless you're absolutely sure they're not touching the shielding.

CDBF1634-913E-4853-932F-3F170861FD5F.jpeg
 
Thank you guys for all of your help fyi. I think I'll just see if I can get simple p-bass pickup for this. A) frustrating and B) My lack of knowledge that is leading me back to point A. Nothing is touching, It is grounded and I made sure the sodered points are correct. The state of working not working is annoying.
L5W
 
You could always just get modern solderless EMG pots for it, and patch a pickup extension onto your pickup, then be done with it. The only difference between the EMG and any other P pickup is the battery - the actual wiring on the controls is the same, though with different value components.

And I'll second what Matt said - I think you've inadvertently shorted the controls to ground - whichever pot is on the top in your last photo is at ground on both ends.