Hi guys new here and had a questions about a specific fuse (resistor so the manual calls it) in the power distribution box under the hood. Its a 2002 XLT 2.3l ranger. Fuse 43. There was a 15 amp fuse in its location and honestly i don't recall if i did that or if its been there since i have owned the truck. What is it for? Is it even needed? Thanks!

 

here is a link that might help ,,,,,,,,,,,,,,,,,,,,,,,,Search Wiring Diagrams

 

FWIW, the owners manual for my 2004 4.0L identifies 43 as "Not Used". Check your own manual for your year.