Hi. I hav installed a Gk3 kit to a USA fender Strat with S1 pick up switch.
All works bar one thing & that's the toggle switch position gk3 only. There is still audio present at the guitar Jack output from the guitar pick ups. As according to gk3 wiring diagram u do not remove original guitar wiring to the audio jack there is always going to be audio there right??? I assumed toggle switch would be wired to switch off guitar pick up audio in the gk only position. Or am I reading diagram wrong? B
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The GK-3 three way switch does not mute the normal guitar output on the 1/4" jack
Instead it delivers a control voltage to the GK processor which manages the switching for the currently selected pickup source position for signals on the GK 13 pin cable
More here
https://www.vguitarforums.com/smf/index.php?topic=133.0
That is so your regular guitar can be used independent of the GK system.
If you don't use a switching jack as shown, the GK only switch position will attenuate the normal guitar signal quite a bit (dragging the signal down through the 12k resistor).