I'm having issues wiring a 3 way toggle in my Les Paul that I feel might be a grounding issue. I took everything apart and soldered a pickup to one of the volume pots. I used a digital meter to check if it was giving me the expected reading of 12.5 which is did. I then soldered the 3 way toggle to the same volume pot and measured the resistance of the output wire on the toggle and it reads 12.5. The problem comes when I connect the ground wire from the toggle. If grounded, the meter will come in at 3-5. I'm expecting it to show 12.5 as long as the toggle is set to the right pickup. I feel like I removed any potential grounding issues as I've done this assembly outside the guitar with minimal components. I've new to all this so excuse me if I'm using the wrong terms or am being unclear.