2 Black wires connected to 1 screw, plus another single black wire in light switch.
I recently bought an older house (built in early 1960's)
I have a 3-way pole Switch for a Dimmer I'd like to install (2 switches for hallway light fixture). I don't own a circuitry tester, to test the wires.
I have this same issue with 2 black wires connected in the same screw, (lower left screw side of the switch)
and another black wire connected to the upper left screw and 1 red wire.
I have a red wire connected to the upper right side of the switch screw. There is no green wire, however I can connect the green wire (on my new dimmer switch) to the back of the box because of a screw.
My Question is;
I'm curious as to know whether the 2 connected black wires in the same screw on the left side is the Black wire connection I need to make?
And the single black wire in the screw above the 2 in the box is the White wire I need to connect to my new dimmer.
Thank you in advance.