Trailer lights - brake and tail - where are the fuses

[cb1000rider]

Connected a trailer to the Granite Ridge this weekend and didn't have any lights.
Crawled under it and found 2 wires that were missing connectors and hanging bare right at where the rear frame extension is.
I got around to soldering them up this weekend. Re-checked the trailer. I have driving lights but no brake/turn signal.
Motorhome has brake and turn.

Anyone know where the secret fuse is? Assuming there is one...

[RoyBraddy]

disregard my comments ... didn't read actual problem close enough

[Jagiven]

Most likely there are a multiple fuses for the trailer wiring harness, in the fuse box in the engine compartment.

I found out the hard way after I jackknifed a trailer a few years ago and to bring my truck in to fix it. I was glad the insurance company paid the $50 bill for a right turn signal fuse for the trailer wiring harness.

[cb1000rider]

Got anything more specific? I'll pull the fuse box cover in the engine compartment. Some indications with F450s that the fuse is "42"... Dunno if it's the same deal with the F53 (Class-A Fords).