when you say wire a new circuit do you mean replace the wire completely back to the fuse box? or where to? The wire i replaced i used either 15/17 amp cable is this right?
If so how was it when my cousin done the exact same on his l reg corsa the wiring didn't melt ata ll and he used the samne wiring kit as mine and the same fog lights?
How else could i do it without connecting to the sidelights then? If i use the first diagram above, the relay i got with the switch has 4 pins on it, so does that mean i could do it that way so i can have the fogs on or off even without any lights on at all?

You will have to wire in a new circuit cos you are drawing too much current down you side light circuit and melting your wires, they aint up to the job of running fogs too, you some times get this when fitting powerfull headlight bulds they pull a higher current through the original wires and melt them

the fog lights are switched so i can turn them on or off with the side lights, but it was melting the circuit, how or where do i attach it to the circuit?

you should not wire up the fogs to the sidelights, this is very stupid and the police will rape you

Wired this way if one light blows the other will still work

I need help with this urgently.
I tried to wire up the fogs on a gsi bumper but it has all gone pear shaped.
I tried to connect it to the loop on the side light circuit and when it was switched on alot of the original wiring loom melted (well the positive on the side lights), which i take is the grey/red wire??
I have cut this right back, just behind the glove box where i thought it was alright and the new wire is fine, but the part of original wire i left there started to melt again.
I thought the original cause was that when i spliced into the side light circuit, i trapped the earth with the live, but am unsure what to do now.
I urgently need help as this has disabled the car for daytime use only
any ideas???