3 way switch question
I will try to make this as clear as possible but it might be long, so my apologies in advance!!
I rewired one of the two old 3-way switches in my house recently but may have a problem.
The switch is setup S1--Light--S2 in a long hallway.
The switch I rewired was at the end of that chain (marked 's2' above). It had typical nm-3 cable with white, black, red, and ground wires present.
I wired it as per the instructions on http://www.acehardware.com/info/index.jsp?categoryId=1284746 (step #9) as that is what the situation appeared to be. I was too dumb to take a picture of the old switch and have since learned my lesson...so I followed the instructions above thinking it would be a simple job.
Anyways, long story short; red wire went to the black screw marked common, black and white wires to the other two terminals, and the ground to the green.
Problem is the switch in the beginning of that chain (S1) now must be on for the switch I rewired (S2) to function.
If S1 is turned to off, then the light wont go on or off when toggling S2. Conversely, if S1 and S2 are both on, and I turn OFF S2, the light goes off but now the first switch does nothing instead.
So basically I have a case of one switch doing nothing independently of the other one, and probably some crossed wires in there.
I'm guessing this is because my common wire is not actually the red wire, but one of the other two - is this the likely culprit? I do not know if the power is going to the switch or coming from the light, is there a way to tell using a volt meter?
MOST IMPORTANTLY, how dangerous is it to leave it like this for a few days? The switches are both turned 'off' (circuit panel is still on) and the house is unoccupied for a few days, so I'm mostly nervous about an electrical fire here. No sparking or smells or anything while I was there, but still pretty uneasy about it knowing something is mixed up.
I'd like to get an electrician in there next week if necessary but I just want some piece of mind the place isn't going to burn down in the meantime. Any thoughts?
Thanks for any help!