light switch old wiring help

[pauldunn1971]

hi could some one please help me with the wires on this light switch please i need to change it to a new one
any help would be apreciated thanks

 

[westward10]

Are there terminal markings at the switch for the red, yellow and blue wires?
Is there earth wires attached to the back box?

 

[littlespark]

Is there any marking moulded into old switch?

I would think the one switch with red, blue, yellow… put the red into Com, and the yellow/ blue into L1 and L2 of the new switch.

On the other half, one red into Com, other red in L1 or L2… doesn’t matter which.

The new switch is simply 2 separate switches on the same plate.

 

[pauldunn1971]

Are there terminal markings at the switch for the red, yellow and blue wires?
Is there earth wires attached to the back box?

hi the only marking are the middle with com and the back box are earthed i did change the one upstairs yesterday wich is a single switch were there was 2 red wires together red and yellow together and the blue on its own if that helps

 

[westward10]

As with the drawing above.
The red, yellow and blue wires, blue into COM, red into L1 and yellow into L2 (it is odd red isn't into COM on the old one but doesn't matter).
The two reds, one into COM the other L1, doesn't matter which way around.
You also need the earths connecting to the earth terminal on the new switch.

 

[littlespark]

ok, i assumed red was in Com.

Shows how complex even simple light switch connections can get.
At least this one had a 'before' photograph taken.

 

[pauldunn1971]

As with the drawing above.
The red, yellow and blue wires, blue into COM, red into L1 and yellow into L2 (it is odd red isn't into COM on the old one but doesn't matter).
The two reds, one into COM the other L1, doesn't matter which way around.
You also need the earths connecting to the earth terminal on the new switch.

thanks very much for taking time out to help it worked a treat much apreciated

 

[westward10]

ok, i assumed red was in Com.

Shows how complex even simple light switch connections can get.
At least this one had a 'before' photograph taken.

I was pretty sure the centre was COM but had the blue in whereas most people would use the red.