Ladies and gentlemen, particularly those who have a mid-60's to mid-70's Jazz Bass, I'm looking for troubleshooting advice in wiring up the piece of junk pictured below.
I don't know whether the Jazz body is rejecting the P neck or it's just something I've spent 8 hours trying to sort out and can't see something stupidly obvious, but I have tried every single combo possible wiring this thing up today with zero results. I've tried a vintage set of CTS pots (66 batch lot) and then three much newer CTS pots - all 250k, two different caps (one ceramic .05 the other a tropical fish 0.20) and it just won't do what it's supposed to do. I have tried all the standard Jazz wiring diagrams on the WWW, and then when none of them worked for me, found a pic of a 69 Jazz body with the control plate flipped open and I copied that which was the OG variation of most of the diagrams anyway - on the 69 there's no ground wire links running from each pot to the ground lug on the jack) and I've got both pickup shield wires starred to the control cavity shield plate and then the control cavity shield grounded to the bridge vol pot (as per the 69 wiring pic below) and all I can get is the pickups to work solo and the tone pot just is ON, it won't roll off to zero, just flat out no matter what.
When I solo the neck pickup, I get full fat neck pickup volume, but when I dial in the bridge pickup it gets to around 90% then the total volume instantly drops to barely half. Same if I start with the bridge pickup - full volume soloed but dialing in the neck pickup it all cuts out to half volume as soon as the vol put hits around 90% dialed. Pickups are both reading as they should resistance wise 6.5k Ohms neck, 7.5 k Ohms bridge) the pots are reading roughly 180k each.
The ONLY difference to a late 60's setup is the Dakota Red custom body (which cost me a bomb and I waited 6 months for) has the tunnel for the bridge ground wire drilled straight to the control cavity compared to the mid-60's and 70's Jazz bodies which had the bridge ground wire tunnel drilled straight through to the bridge. pickup cavity where a bare solid wire ran from under the bridge and was soldered to the bridge pickup shielding plate.
I appear to have filled all solder lug holes properly, can't see daylight through any of em, and the brass control cavity group wiring is solid too.
I'm going nuts, anyone got any insights?
I don't know whether the Jazz body is rejecting the P neck or it's just something I've spent 8 hours trying to sort out and can't see something stupidly obvious, but I have tried every single combo possible wiring this thing up today with zero results. I've tried a vintage set of CTS pots (66 batch lot) and then three much newer CTS pots - all 250k, two different caps (one ceramic .05 the other a tropical fish 0.20) and it just won't do what it's supposed to do. I have tried all the standard Jazz wiring diagrams on the WWW, and then when none of them worked for me, found a pic of a 69 Jazz body with the control plate flipped open and I copied that which was the OG variation of most of the diagrams anyway - on the 69 there's no ground wire links running from each pot to the ground lug on the jack) and I've got both pickup shield wires starred to the control cavity shield plate and then the control cavity shield grounded to the bridge vol pot (as per the 69 wiring pic below) and all I can get is the pickups to work solo and the tone pot just is ON, it won't roll off to zero, just flat out no matter what.
When I solo the neck pickup, I get full fat neck pickup volume, but when I dial in the bridge pickup it gets to around 90% then the total volume instantly drops to barely half. Same if I start with the bridge pickup - full volume soloed but dialing in the neck pickup it all cuts out to half volume as soon as the vol put hits around 90% dialed. Pickups are both reading as they should resistance wise 6.5k Ohms neck, 7.5 k Ohms bridge) the pots are reading roughly 180k each.
The ONLY difference to a late 60's setup is the Dakota Red custom body (which cost me a bomb and I waited 6 months for) has the tunnel for the bridge ground wire drilled straight to the control cavity compared to the mid-60's and 70's Jazz bodies which had the bridge ground wire tunnel drilled straight through to the bridge. pickup cavity where a bare solid wire ran from under the bridge and was soldered to the bridge pickup shielding plate.
I appear to have filled all solder lug holes properly, can't see daylight through any of em, and the brass control cavity group wiring is solid too.
I'm going nuts, anyone got any insights?
