The connection that changes
In the supported Les Paul circuit, the selected pickup feeds its volume signal-input lug 3, the wiper/lug 2 feeds the selector and the selector output reaches jack TIP. Lug 1 belongs to ground. Modern versus 50s wiring changes where the tone-loading branch attaches; it does not turn the tone capacitor into an inline component in that main path.
Modern connects the branch to volume signal-input lug 3. The supported 50s arrangement takes its tone feed from wiper/lug 2 instead. The Generator also represents the corresponding tone-pot terminal arrangement for that configuration. Use its complete diagram rather than moving one wire on the basis of an unlabelled photograph.
The tone branch sees a different node
At full volume the wiper is near the input end of the track, so the two attachment nodes can be close electrically. As the volume changes, resistance separates them. Moving the tone branch from input to output therefore changes how tone resistance and capacitance interact with the volume divider and external load.
Players often describe 50s wiring as retaining more clarity during volume reduction. The useful electrical explanation is the changed loading and control interaction, not a claim that old wiring creates extra high frequencies. Pickup impedance, cable capacitance, control settings and the amplifier input all matter. A familiar name does not define a guaranteed audible outcome.
Volume and tone are not independent adjustments
Turning tone changes a frequency-dependent load. In the 50s arrangement that load acts on the volume-output node, so the perceived volume progression and tonal adjustment can interact differently from Modern. It is normal for a useful setting on one arrangement not to correspond to the same knob number on the other.
This is separate from independent versus dependent two-volume wiring. Moving a tone feed does not by itself change the supported volume input/wiper assignments. In the conventional combined-pickup circuit, turning one volume completely down can still ground the common selector output and mute both pickups.
Consider a treble bleed separately
A treble bleed bypass connects volume input lug 3 to wiper lug 2. It is a different network from the tone branch. Combining it with a different tone-feed position changes the complete circuit again; do not assume that two changes which each seem useful will automatically combine into a better result.
The existing Kit Builder does not offer a bleed with its 50s wiring configuration. Respect that boundary instead of treating an explanatory guide as an unsupported purchasing option. When comparing Modern and a bleed, hold pickup, cable, load and useful volume positions constant.
Compare the wiring, then prepare the bench
Record the existing connections and verify the actual pot and jack terminal identities. Front and rear views can reverse apparent left and right. Select the supported Les Paul wiring in the Generator and follow the complete connection list, including the ground return and the tone terminals.
Check insulation, cavity clearance and continuity with the instrument disconnected before testing it through equipment. Keep the original component values constant for a meaningful wiring comparison. Changing taper, capacitance and wiring simultaneously makes the result difficult to attribute.
Know which tool answers which question
Signal Forge can inspect the supported circuit topology, while the Wiring Diagram Generator supplies a physical connection reference. The current electrical-response model is bounded to supported Modern single-pickup arrangements; this article does not extend it to 50s or combined-pickup response.
Use the available graph to understand connections, and a controlled practical comparison to decide which adjustment range suits the instrument. Neither arrangement is universally correct. A repair should first restore intended connections; an experiment should change one defined variable at a time.