Locate the fuel pump relay and you'll find the fan relay and it are interchangeable so substitution will aid diagnosis.
Mine is a 1999 so won't confuse you by telling you where mine are, the colour coding of the loom is your friend.

My fan relay failed 2 years ago.


diagram

The full set are on gomog.com


2009 4/4 Henrietta
1999 Indigo Blue +8
2009 4/4 Sport Green prev
1993 Connaught Green +8 prev