Troubleshooting Er Code on Activator Brake Controller on 2001 Dodge Ram Pickup  

Hey there. Ive read just about every question here and around the Inter Web. The truck came with a used reese controller. Could not locate a blue brake wire after it went into the firewall and to the harness near front driver wheel well. I have run a wire from there by passing the harness straight to the plug. I have installed the reese T connector at the taillights into a 7 flat pin plug Blue to blue, white to white, brown to brown, green to green right signal and yellow to red left signal.there is no allotted spot labeled for yellow! Where do I put the stop light wire from the brake controller? Trailer end there is power at the black wire that goes to both taillights but I have nothing to its corresponding post on the truck side. The tail lights come on with the lights, brake lights come on with pedal and manual controller and signals work although marker lights do not. I have brand new brakes installed with clean grounded wires. Driving the trailer around slowly I get a number reading while manually pressing and if I depress it all the way in any setting I get an ER and it does not seem to slow the wheels at any time. Using the brake pedal I always get an ER. I tested the wires behind the controller and all light up circuit tester as they should. I have tired every combo of wires and all connections and wires are clean, no fray or rust and not touching any other or metal. Could it just be the controller!? Sorry for the lengthy explanation Please ANY advice is appreciated! Thanks

asked by: Pete