Possible component failure inquiry.

[paul6string]

Happy Easter to all. So I have a early 90's Fernandes HSS strat, which I replaced the factory bridge pup with a DiMarzio SD about 8 or 9 years ago. The electronics are all original. If I remember correctly, I eliminated the tone pot from the bridge pup circuit. I decided to bring it back into rotation after sitting on a wall hanger for a year or so. The guitar used to sound badass, but it sounded very nasal, plinky, and the output seemed to be lacking. I was going to bring it to last night's gig with my new 5150III, but I couldn't digest the tone. To make sure it wasn't the amp since I never really got much acquainted with it, I plugged in another strat with an EMG 85 in the bridge, and an Edwards LP with a JB in the bridge. Both sounded full, beefy, and had a lot more compression with high gain. Possible failing volume pot?

[broslinger]

My money is on the switch failing/dirty. Volume pots usually don’t fail.

Do all of the pickups sound bad?

[paul6string]

To be fair, the neck pup is a factory single coil, and I lower the middle one flush with the pick guard because it gets in my way. Hard to compare with them.

[I'MAPUNKROCKERDAMNIT]

The SD in my SG is wired with two extra toggle switches: one is a split coil and I can't remember what the other does... maybe it's a phase switch?

Just spitballIng here but...
If it sounds nasally, maybe it was accidentally wired in with the phase is reversed?