Escort Diesel Wiring Problem

[briski]

hi guys, can anyone help, recently purchased a escort van 1.8 non turbo, 2000 to save my st from the commute/ tools etc, but I cant find where a wire leads to, I have the wire coming from the headlight area main loom, its black/white and single, it then clips to the fan housing at the bottom right as you look from the front, I cant find the rest of it, need to know where it leads to if anyone can help. tried the Haynes manual but, yanno ....im scoobied, 2 of us took the engine out but neither know what happened to the wire, if I can backtrace it, might help.

many thanks

brian