Most likely on the bottom of the spare wheel well, in a cradle thing with the fuel filter.
A 4x4 granada is going to have the same fuel system as 2wd one anyway!!
There are no HAYNES cossie manuals, as they tendo not to do unless they see a certain amount of sales of the car to know they have a market to sell to, don't know how many it is but quite a lot!!
You would first do well to check your fuel cut off switch has not tripped out, and can see this by the button poking up which you have to depress to reset it, either in the kick panel by your feet, or passenger side, or if not look in boot under spare wheel.
tabetha