I have just bought a new light switch(double switch)one of these switches run the outside light and the other runs the living room light, the living room light has another switch on the other wall. when i took off the old switch off i decided who ever fitted it had done it wrong(what a big mistake that was LOL). Anyway at the moment the left switch is acting as a go between(if you want the outside light to work turn it on and for the inside light to work turn it off,the right switch turns these lights off and on) I have look at a few diagrams but it still doesnt make sense to me.All i can remember is that the red wire was linked somewhere and also the yellow wires where twisted together and rammed some where.I have 2 main leads each with a red,blue and yellow wire on each,also the main earths from both which is earth to the light switch itself, if anyone can help, please do as this will stop the wife nagging............