Originally Posted by ezawacki
this may not apply but may be worth checking.
About a month ago I lost my turn signals on my 2005 F250. Long story short, replaced F27 fuse and vacuume pump. That F27 fuse took a long time to find as it was not listed in my owners manual.
Have you checked the owners manual, as Ed pointed out, to see if it has a listing of the fuses and their location in the fuse box. A lot of the time there is a schematic on the inside of the fuse box cover that tells what each fuse controls...........or you can also just look for a blown fuse if it's that type, and not a relay..
You can also start at page 323 here: