Yep, Both lights should go on and off together.
and Ill give that a shot Billy Bob. another problem is that I cant change the wiring to Light #1 as the wall was completely finished by the previous owner, will this make a difference?
Do you then say you have 3 travelers instead of 2?Yes, that's called a California or coast 3 way...
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This assumes two travelers between the switches.
Assign each switch a number.
With switch #1 & switch #2 down, light is on or off?
With #1 up & #2 down, light is on or off?
With #1 down and #2 up, light is on or off?
With #1 & #2 up, light is on or off?
In principle, with the answers filled in, the problem(s) can be pinpointed.
Test cases welcome. . .
Taking only the case shown above, if you step through on a piece of paper all 3 ways of hooking up the 3 terminals of a working #1 switch to 3 wires and with switch #1 in both positions [6 diagrams in all] I don't see how this outcome is possible unless you have #22 wiring with 3 travelers.#1 down, #2 down - lights are on
#1 up, #2 down - lights are on
This assumes two travelers between the switches.
Assign each switch a number.
With switch #1 & switch #2 down, light is on or off?
With #1 up & #2 down, light is on or off?
With #1 down and #2 up, light is on or off?
With #1 & #2 up, light is on or off?
In principle, with the answers filled in, the problem(s) can be pinpointed.
Test cases welcome. . .
It would be my bet that the upstairs switch is not functional due to miswiring, bad switch or it just plain never worked.
This is awkward, but...
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