2018 stx f150
I’ve installed brake controller, enabled all computer portals, problem is my fuse box doesn’t have pins for the 30 amp fuse . Looking to put an inline fuse, I know modules behind glove box not sure which one to tie into.

 

Have you looked at the fuse box under the hood?
On the 2013 you had a small relay and fuse to add to get things working as I recall.

 

I thought F150s had this issue for 2017 or 2018 where a circuit had to be added for the trucks that didn’t have ITBCs installed from the factory?

Yes, I am remembering something before 6:00am on a Saturday morning!

https://www.ford-trucks.com/forums/1...-a-18-a-2.html

 

I remember reading something about 2018s having that issue. I used to have a 2017 and added the oem ITBC without any issues.