They make a gadget that converts separate turn signals to combined lights. Might be able to wire that in for the 7pin plug out back. Never had one, but can't see why it wouldn't work.

Also, if you go to buy a brake controller, I would suggest an air/electric version to a std "pickup" style controller. Even the new digital versions are a pain and I tried it in my Mack. Got tires of it and bought air/elec version. It now works proportional to truck braking.

If you only pull the trailer once in great while, might not be bad, but I pull mine every time out basically.

Thanks for writing back do you know what the name of this thing is . i am helping my friend on his truck so he can use it in his business. I thought it would be a good idea to pull my small trailer when i need his help in my excavating business moving the small stuff. he doesnt want to spend alot of money right now cause he just got laid off and his employer just closed up shop. he's a good friend and i want to help him get the old girl on the road. and the former owner would be thrilled to see it going again. the old owner had to let the truck go cause of his health and still has a b model with a r model cab on it and is hoping to be back on the road again this spring. i hope it works out for him .the 1964 b-53 ran the roads every day till 2 years ago hauling stone and dirt. i will come up with something to make the wiring work . thanks again Don GreenGiant2 sorry for rambling on