Help with wiring issues

[lyonk55]

Hi All!

I'm having a bit of a problem with wiring during a pickup swap. I believe I have all the connections in the right places, but there is no output from the bridge pickup or from the middle position on the switch. The neck seems to work just fine.

I've had a look with a multimeter and connectivity seems ok, but when I measure resistance across the bridge volume input and output, there is nothing. Detaching the pickup and measuring the resistance give a sensible result, so this suggests a short somewhere when it's wired it, right? I can't see any obvious crossed wires though and I've re-done the solder joints for the bridge with no change.

Any advice for things to try next or if anyone has an idea about the problem, I'd be very grateful: this is driving me mad!

 

[JustinRhoads1980]

What setup/configuration are you trying to do? Do you have a diagram and if so post a pic of that.

multiple pics of how it is currently wired and closeups aswell would also be helpful

 

[lyonk55]

I'll take some photos in a bit, but it's a 2 humbucker, 2 volume, 1 tone with push/push coil split. Pickups are Seymour Duncans and I'm using their wiring diagram, except the switch appears to a 4pdt toggle.

https://docs.google.com/gview?embed...-content/uploads/2016/05/2H_3G_2V_1TppSPL.pdf

 

[lyonk55]

Promised photos.
Also considering just putting the previous Fishman wiring back in and trying out some different actives. This guitar is a bit of a pain to control the low end.

 

[oversteve]

Well, idk how this switch works exactly but if it is expected to work like a regular 3 way switch then if the neck position works and the middle position doesn't give any sound that means that the hot wire from the bridge pickup or the pot lugs are grounded somewhere, or the pot is busted (unless you have wired the switch completely wrong).
First check if the lugs of the bridge volume don't touch the shielding in the cavity.
Then try to unsolder the black wire of bridge pickup from the volume pot and see if the middle position starts working. If that's it then the pickup's black wire was grounded or there is issue with it or it's wiring.
If not then try to unsolder the wire from the volume pot going to the switch and again check for middle position. If it starts working then the pot is busted or it's lugs are touching ground.
If doesn't start then either switch is dead or you have totally f'd up the switch wiring

 

[jarledge]

give me a few and i'll see if i can get you a diagram. it looks like your switch is wrong. I assume you have an on-on-on switch.

 

[jarledge]

this should work.

 

[lyonk55]

Thanks folks, I'll try these out this weekend and key you know how it goes. I've got some new pots to pickup on Saturday too since one definitely doesn't work right (the "working" neck one won't turn freely). So if the bridge one is dodgy too then I've got a replacement.

 

[lyonk55]

Update:
Took me longer than planned to get around to it, but the problem is now fixed! Followed your troubleshooting suggestions oversteve: disconnecting the bridge volume from the switch got the neck working in both positions. So I swapped in the new pot and trimmed back the old wires a bit to get some cleaner ends and that seems to have done the trick.

Thanks for the help guys!