Need advice - installing a fan timer in bathroom on a 3-way switch
As the title suggests, I want to install a timer for the bathroom fan (2nd floor) which is on a 3-way switch. One switch which is on the main floor (which I want to get rid of) and another switch in the bathroom,
Did some search and found the following but still have some questions:
https://www.hunker.com/13414121/how-to- ... h-to-2-way
1) Can I assume that the power line is fed to the first switch that is on the main floor? If not, how can I test that?
According to the steps, for the switch that is on the main floor, I can hook up one of the traveller wire with the power source and cap the remaining traveller wire.
For the other switch in the bathroom (that will be replaced by the timer), are there supposed to be 3 wires (2 travellers) and another going to the fan?
The timer comes with 4 wires (white, black, red and green). I know white goes to neutral, green is ground but what about the red and black wires - how do I hook them to the existing wires?
Is the black wire of the timer supposed to be hooked up to the traveller that is hot? And wire going to the fan hooked up to the red?
I’ve already replaced 3 timers on single pole switches but this is a bit more tricky.
Thanks for reading and giving your feedback.