Ok, problem found!!!
, after hours of testing, checked all the fuses, relay box, switch connections, etc. And found nothing, I decided to clean the shift motor, then guess what, it works now. I didn't think it was the motor cause the 4x4 lights didn't turn on, I guess the lights turn on when the 4x4 actually engages. It works different in my mothers truck hers is a 99. But ohh well, but now that it works I have another problem
, when I advance, theres a loud clunk from the front end, the tires roll a bit then "clunk" then they roll again then a big clunk again, what do I start to check? Could the front differential be damaged??? Thanks for your help.