Ive got a 33000gvw international single axle dump truck with air. I have a 6 ton trailer and i just bought a 12 ton trailer and they both have electric brakes. A couple of months ago i took the truck and trailer to the trailr manufacture to wire the truck for air over electrick brake controller. I hav a tekonasha P3 break controler for it but it keeps reading WARNING CURRENT OVERLOAD NO TRAILER BREAKS. All the lights work properly on both trailers i just dont have trailer breaks? I got underr the truck and looked at the wireing and theres only 4 wires going back to the electrical trailer conection on the truck end. They have the black wire hooked to 12v power supply, white wire hooked to ground, blue going back to the hook up, and red going to a air controle pressure regulator behind the seat (these are all the wires comeing out of the break contoller). Any ideas of wear they went wrong or any advise would be greatly appriciated!