Hi,

I tried unsuccessfully to install a 3 way switch. Can anyone help me to make the connections correctly or tell me if my electrical system is compatible.
 

Wiring on my old 3-way switch #1:

• 1 black for load
• 1 other black
• 1 white
• Also, in the box there is a white and a red together.

Wiring on my old 3-way switch #2:

• 1 red for the load
• 1 black
• 1 white
• Nothing more in the box

I'm await  your suggestions!

Best Regards,