Afternoon all.
My headlights weren't switching from sidelights to dipped beam, I located the issue to a faulty relay.

A friend had a spare relay from a disco 1 so thought I'd give that a try, I have now lost all power to the headlights, no dipped or main, they show as working in the cab but nothing at the lights, I also have no power to the windows?
The engine management light and glow plug light are no coming on either

I've checked all the obvious fuses/ relays but to no avail.

If someone can point me in the right direction it would be really appreciated.
Thanks
Leo