I couldn't find anything with a white/blue wire, but I recently blew the fuse that powers the OBD-II and cigar lighter and replaced the wrong fuse. After a lot of tracing, I discovered my error and all was well.
Check the fuses above and below the one you think is the correct one. It's easy to miss count when you are standing on your head and trying to see what is in the fuse block. It does look like there is a blank between the top 2 fuses, but there is not. My owners manual shows it is fuse 2-12, #3 in the second column of fuses.
2003 F250 XLT Sport Ext Cab ESOF FX4 6.0L TorqShift, Sonic Blue/Black Leather.
BrakeSmart Trailer Brake controller.
Leer Cab high Browning Edition Cap.
2004 SunnyBrook Solanta 28' TT small slide 7800#
35 Years in the trenches!
Retired Machinist & Manufacturing Engineer for fuel control systems for very large Diesel Engines. Locomotives to Super Tankers.
Designed and trouble shot manufacturing processes for stuff from Design Engineers. Sometimes had to wrestle for design changes.
Designed and built tools and equipment to machine, assemble, disassemble, repair and test.
Wisdom comes with age, but sometimes age comes alone.
"Nothing is FOOLPROOF because fools are too ingenious"-Mark Twain