Three questions..where is the fuse for the oxygen sensor located? Under the hood between the fuse box and cab.
A black box about 6 relays, what are they for? Between the relays on the fender wall a small fuse box with six small fuse slotts, what are they for? please help thank you.

 

You should have the fuse layout in your manual.

 

Ford manuel shows only one inside and the large one under hood. Hayes and chilton shows only the same..

 

Here is the little fuse panel you are asking about.

 

Thanks mine was missing the 5 amp, part of my problem solved. Thanks again..