Wiring up a Caravan / Coleman

[cantlook]

I have a wiring question. I have a 2003 Dodge Grand Caravan. I am trying to wire this to my 2000 Coleman sedona. In the rear cargo area of the Caravan there is a large group of wires near the rear bumper. I have tried without sucess to locate the proper wires. I can get the running lights, the right and left turn, only. The brake lights will not come on when the turn signals are on. There is a seperate wire for the brake lights. Any suggestions.
On the front frame of the pu wires from within the frame stick out. There is a large blue wire, and seperate black & white wires with a plug on the end. What are the black & white wires for? I thought the blue was for the brakes, (which I am trying to hook up also). The 7 pin connector from the trailer has a blue wire already in it as if it is ready to hook up. Which wire is for the brakes?
Any help would be greatly appreciated!

[dbaldree]

Blue would be brake.My 2001 coleman tacoma has a white connector with black and a white wire for my battery. I have what i thought at first was a blue wire but it was actually green just sticks out of the frame with a crimp connector. Hope this helps Daniel