problems with dimmer switch

[reenag06]

I have bought a dimmer switch to operate a 2 way system where I have two lights in the kitchen operated simultaneously but by two switches. I have taken one switch off to put in a new dimmer but cant get it to work - electric keeps tripping. There are two red wires, one black (with red tag) and one brown. The dimmer has L1, L2 and common. Can anyone tell me where the wires should go as the instructions aren't clear!
Thanks,
Maureen

 

[ad13]

cant think why you have red/back and brown/black cables but try putting the two reds into c, the brown into L1 and the black marked with red (hopefully a switchwire) into L2


Hope this solves the problem.

 

[Taylortwocities]

What wires went where on the OLD switch?
You did remember to make a note, didn't you?