First, sorry for my bad english.
I,m from Spain and i have a ford transit Reimo 2.5d of 1989.
The problem is when the temp is too much cold, how in a ski resort or in the mountain in winter.
http://www.oscaro.es/lista.asp?ID_GENER ... EVELS=2606
this is de pre-heater, and i think that the problem is electric, becuase i have checked with the tester and i don´t have current with the 2 position of the key.
I have the technical book of the transit, but the electric part isn´t good and the pre-heater isnt .
I don´t know if the signal went of a fuse or a contact of the key.
i try to take some photos to show you.