I was having problems with my mk2 fuse box I was getting a permanent light on even before I put the key in one side of the fuse box was not getting any power without linking the fusebox to each end but it still the lights stayed on permanently so I run a fused link wire from the back of the ignition yellow wire to the spare fuse post /Lug on the base of the fuse box as this is only live when the ignition is switched on I tested everything and everything works as it should
I hope that this is of to helps others as I have tried every combination to get to it to work as it should and this is the way it works