Wiring a double light switch

Question

Hoping for some help I am fitting a new double light switch were one of the switches is a 2 way light.

The back of the light switch looks like this

  C          C

L1 L2      L1 L2

Now the problem I have is that I only have four wires and six connections. All of the wires are red but two of them have a extre grey sleeve ( I assumed these were the common wires).

I have tried wiring in the two commons then wiring switch one L1 connection and switch 2s L2 connection then bridging the L2 on switch one and L1 on switch two, I can get the two switches to work this way but only if the partner switch to the 2 way light is left on.

Where have I went wrong???

Answer 1

This is the schematic for wiring a pair of 2 way light switches: That means that two switches control one light and either switch can turn the light on or off.

Typically the L1/L2 wires are both red, or one is black and the other red. In no case should either of those be white.

Answer 2

Depending on your location, those may be 2-gang 2-way switches designed so that multiple switches can control each of two lights (e.g. switches at top & bottom of stairs and at each end of a hallway)

In which case they may have been wired up for 2-gang 1-way usage

Sleeved wires usually indicate switched live. I'd try to check this with a voltmeter or by inspection but you could try connecting the red wires to C and the corresponding sleeved wires to L1.