Doubles wiring

Just my thought. You can draw the actuating signal from the same wire the Prodigy uses. Not sure how the Ford is wired but would go direct to the underhood panel and use a new relay and wiring all the way back. With the extra length, increase the wire size for the run all the way to the second trailer and use a simple connector next to the original trailer plug.

Good luck
Bill

I have checked all local laws. I am good with tandems to 70ft here in CO and most bordering states as well.

The reason for two brake controllers is to allow adjustment of the rear trailer in tow to have more braking power than the 5er to help control sway. I currently have a Prodigy brake controller which is good to 8 brakes, but that isn't really the point. I want to be able to adjust each trailer individually to help straighten the load if needed. And, to allow the rear trailer to have slightly better braking than the trailer in front of it.

It also eliminates the amp draw fall off through the wiring being 60+ feet long.

It also gives me a backup controller just in case I lose one while towing. Stopping 24,000lbs with just the tow rig would suck. Especially running over Loveland and Eisenhower passes here in Colorado.

I was just curious where to tie the controller into. I will be using the brake switch at the pedal for the 2nd controller.

The only info I can offer is each BRAKE MAGNET will draw around 3.0 DC AMPS each with 12VDC applied to it...

You should also check with your state laws on what you can tow with one truck where your trailer is licensed... Add all of the wheels up that has electric brakes installed and see if your planned brake controller is capabile of providing that much current.

Alot of commercial brakes on similar utility trailers have SURGE BRAKES instead of ELECTRIC BRAKES. This may be a solution for you to check into as well.

Roy Ken

OP, you may want to visit a truck or trailer repair facility and ask them for suggestions.

AddictedOffroad wrote:
I am ordering a 2nd brake controller for my truck and do not want to overload any wiring going back that far.

???

Did I miss that the first time through, or is that an edit add-on???

In any case:

Now I'm following the thread to find out how one wires in two separate brake controllers!

There are brake controllers that are rated for 2, 4, or 6 brakes. There may even be some for 8 brakes.
What is your current brake controller rated for? In order to work properly without burning out, it must be able to carry the electrical load for ALL the brakes installed on your double tow. If you will have 8 brakes, but your controller is only rated for 6, you will need a bigger controller or use two different ones.
I would use 10 or 12 gauge wire for the run to the brakes on the second trailer. The simplest and easiest would be to splice into the brake wire at the rear axle of the fiver. That may not be the BEST, though.
Good luck.

Just posting to follow the thread- it's news to me that one can run two different trailers' brakes from one brake controller, so I'll be most interested in how the wiring is done.