1995 VW Polo 1.0L Fuse board Problem

[MetalHead]

Hi all

I have a 1995 Polo and it has a fuse board problem,now and again it cuts all power to the car,i have checked all connections on
the back and they are all ok,i have to leave the board hanging in the foot well because sometimes if you lift it up it cuts all power
but on other times you can move it about all ya like and it does nothing all is fine,so i am left wondering what it could be,has anybody
had the same problem or know what it may be ?.
I have tried moving the fuse board down and out so i can see the back of it better but it just does not want to move a great deal once
it is un clipped from the cradle,and also the rear wiped does not work since this problem but the washer does.