4x4 electric coupling

Good, I wanted to see if someone supports me with a problem that I have with a tacoma year 2009, it has the coupling of the double traction in an electrical way and I have not managed to make it work, I have already cleaned the two engines, I have made them work with direct current, but at the time of making all the electrical connections it does nothing, it does not fit ... no longer dry Owner is my workshop and I'm already a bit on the edge. I would thank you very much if they give me a orientation.

HEY FRIEND I AM JUAN RAMON MOLINA DE COMAYAGUA 99586860 PLS CAME ME, I am Electromechanical, today's cars bring a computer for Ke the double I have made them to Isuzu Dmax, Toyota Tacoma, Viggo, Xterra and Frontier

Solved problem the motorcitos (front and the box)