My truck (01 ram auto) had a trailer brake control in it when I got it. So I did not hook it up. I hooked the skid loader trailer up to it and I have no trailer brakes. I know the brakes on the trailer work. How do I test my system in the truck? It looks like it is hooked up with the factory wires. The brake controler might not be workings or it a wirering problem ??? Any help would be great!! Thanks