marty732

I tried to install a trailer controler on my f 150 its a 2009,and i don,t have any power on my red wire going to my control box from the truck,do i have a blown fuse,and does any one know which one,I really need some help,Iam new to this sight, I work at the sterling plant for 32 years as a machine repairman.and Iam also 100 percent disabled vet. thank you marty 732

Rkcrawl

I think there is a fuse you need to install... On my FX4, (which doesn't yet have the factory brake controller) the supplied brake controller pig tail has a fuse specifically for the controller circuit.

caperJ

Check here

https://www.f150forum.com/f75/how-ad...ory-tbc-76772/

caperJ

On my 2011 it says fuse 21 as well as battery charge relay 9

Scanned for you

marty732

I installed those two fuses before i checked to see if the red wire from the truck was hot.to the control unit.does any one know what relay or fuse makes the red wire from the truck hot,going to the trailer control box. marty732

marty732

the 30 amp fuse that ford supplied me with was blown,I assume it was good and had no power to my red wire,I had to go down to auto store,because dealer don,t have any new fuses,everything is running, thank everyone for helping. marty732

Abn150

This is good info, but nothing to do with the Trailer Brake Controller. The fuse and relay shown here activate the trailer batter charging or constant power circuit. Used if you have a rechargeable battery in the trailer that activates the breakaway brakes, or some other constant power requirement.

gaelach

I'm trying to figure out the same problem: '09 F150 with no power to brake controller red wire.

The owner's manual says fuse 17 is for the trailer brake. After adding fuse 17 there is still no power to the controller.

The brake controller connector has a red wire on it, but there is only one contact for fuse 17 in the distribution box. The contact has 12V on it.

Could the red wire be terminated in the wiring harness somewhere?

Any ideas?

Thanks, Val

gaelach

found the answer in another thread "Ford F150 - 2009 ford f150 brake controller harness" - the '09 4x2 standard cab is apparently missing some wiring needed for the brake controller.

Thanks F150 forum!

blueovelboy

what post and what wires? dose your truck have the 4 pin and 7 pin from the factory? thanks