In my garage (the other end of the 3 way switch) had four yellow 14 copper gauge wires used to connect this three way switch. Updating switch. When I tested the wires with a Klein clamp meter it appeared that only one of the wires is truly a traveler (no voltage) however it appears that the other three have voltage (20-120). I tried to spread the wires apart to make sure that there was no interference. I also used a no contact device which showed power on all three. I always thought that it doesn't matter which gold brass travelers go to and the load goes to the black on the switch. Again what do you suggest about the switch having four 
wires on a three way switch)
All go to one same circuit breaker. What am I doing wrong with these four wires? The house 3 way has only three wires. How can I identify the other traveler wire? I tried to wire it the way they had it originally which I think was wrong. Why did they put a fourth wire in there anyhow?
Wiring – 3 way switch four wires
wiring
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Best Answer
It looks like the yellow one going to the 3-terminal Wago is the common from the nearby switch, and is supplying switched hot to the lights in the left and right conduit.
The other two yellows going into 2-terminal Wagos are travelers. The center conduit brings those, and also neutral, which is the return for the light, and two unrelated oranges that look like an unrelated switch loop.
Someone might send a memo to this electrician reminding him all those different colors of THHN wire are on his truck for a reason. Using the same color for common/switched-hot and travelers is kinda confusing.