It's a 1986 Diesel 1.6. Please could anyone advise me which relay might be the faulty one. I cannot find a link to a diagram of this fuse box illustrating which fuses and relays are for what. There are only 3 square black plugs in there no. 18, 43 and 21.
Have been reading on the forum that earths need to be checked at the back of the fuse box as well. No. 18 was quite warm when we opened the fuse box. Should they feel warm ? Could this be the faulty relay ?
Any step by step help would be most appreciated as anything to do with electrics gives us immediate anxiety attacks.

Cheers Nick