Here s how to do it without breaking the plaster and lath.
Old style light switch wiring.
Anyway i buy a double 2 way switch to replace it picture below anyway i take off the.
Methodically dealing with one wire at a time will help avoid confusion and mistakes.
We have a double switch for our bathroom that controls the extractor fan left switch of 2 and the bathroom lights right switch of 2.
If the new switch s cover plate is smaller than the original you can make it easy on yourself and cover the old plate s outline with a slightly oversize new plate no wall repair or touch up paint required.
Moiak light toggle switch retro single control switchs 6a round lamp switch mounted wall light button switch old fashioned toggle switch 6 26 6.
Probe the existing hole with a keyhole saw to find the horizontal edges of the lath.
Fix old house wiring problems.
Upgrading to a new rocker style switch takes just a few minutes and requires no extra wiring or special connections.
We need to replace it as its bust basically.
Conventional 3 way wiring is not very complex with conventional wiring the line line voltage connects to the common of one switch.