Living Room/Upstairs Landing Light Switch Nightmare

[bigmac1108]

I'm hoping someone can help me...

I have tried (unsuccessfully) to change the light switches in my lounge and upstairs landing. Here's the scenario.

Lounge has a Dimmer Switch by the front door which controls the Lounge light.

Also in the lounge is a Two Gang switch on which one switch controls the Lounge light and the other controls the Upstairs Landing light.

Upstairs Landing - One switch which controls the upstairs landing light.

I have changed the Dimmer Switch and the Two Gang and some wierd things are happening. The dimmer switch now turns on both Lounge and Upstairs Landing lights. I have also changed the two gang and this now does wierd things too, like turning on all lights with one switch and only upstairs with the other. I have not changed the upstairs one yet.

The new fittings I have have the following terminals

L1
L2
L3

The wires I have are

RED
YELLOW
BLUE
(EARTH which is connected to the back box)

Can someone help me on this....it's really fustrating ;-(((

Thanks

 

[ban-all-sheds]

Study the diagrams of 2-way switching in the For Reference section.

The wires I have are

RED
YELLOW
BLUE

You surely can't have that and only that at every switch..

 

[bigmac1108]

Hi Ban-All-Sheds

Thanks for the reply...

Here is what I have at each switch

Dimmer in Lounge = 1 Red and 1 Yellow and 1 Blue

Double Switch in Lounge - 2 Red, 2 Yellow, 2 Blue

Upstair single switch - 1 Red, 1 Yellow, 1 Blue

Have looked at the diagram but can;t make any sense of it ;-(

 

[ban-all-sheds]

Here is what I have at each switch

Dimmer in Lounge = 1 Red and 1 Yellow and 1 Blue

Double Switch in Lounge - 2 Red, 2 Yellow, 2 Blue

Upstair single switch - 1 Red, 1 Yellow, 1 Blue

I guess you must have the "cable saving" method shown here. Look at the ceiling fittings, and do some continuity tests with your multimeter.

Have looked at the diagram but can;t make any sense of it ;-(

The ones here and here should be easy to follow. I have to say that if you really can't understand how it works then you should accept that electrics are not for you and get an electrician in....