Need relays an fuses for 02 f350 for tow trailer breaks

SOURCE: no lights on the tow trailer

the tow light fuses are under the hood if it is a factory install you can go to this website and print the whole manual for free or just what you need ( fuse locations) good luck
https://www.fleet.ford.com/maintenance/owners_manuals/default.asp

SOURCE: trailer towing fuses

Battery junction box (BJB) fuse(s):

• 5 (30A) (trailer electric brake controller)
• 34 (25A) (trailer tow turn relays)
• 42 (30A) (trailer tow parking lamps)
• 44 (30A) (trailer tow battery charge relay switch side)
• 63 (15A) (trailer tow reversing lamps

SOURCE: ac relay location in fuse box

you have to refer to the owner's manual. that is where they list the fuse/relay locations. if not there, you may need to refer to the diesel supplement book. but i think it will be in the owners manual. i have a 2002 f250 and that's where mine are.

SOURCE: need fuse list for 2001 ford f350 trailer lights

In the fuse box under the hood, fuse in position 20 is a 7.5amp fuse for the trailer left turn circuit, fuse in position 22 is a 7.5 amp fuse for the right turn circuit, if the fuses are good and you have power at them it is going to be wiring, at the back of the truck close to the driver side at the bumper is a gray connector that will take factory wiring to you trailer wiring the yellow wire is left turn/brake light, the green wire is right turn/brake light, and the brown is tail lights, and the orange wire is 12volt feed for if there is a battery on the trailer that needs to be kept charged for break away safty brakes.

SOURCE: factory trailer connecter for trailer plug in - no current

Also try http://www.etrailer.com/faq-wiring.aspx. They have a great website with lots of info. Check ground.