Good point, ac and heat works but doesn't cycle, it's always blows on window. So it must be the heat controls, not the cruise control.looks like the vacuum line to your cruise is hooked up, try lifting the brake pedal lightly with your toe next time you try to engage it. might just be a out of adjustment brake switch.
I understand the ac and heat works, but does it cycle from vents to defrosters to floor?
that line is for the heater controls on my truck. (unplugged it and tested......really bored today LOL)
its below the guage cluster on the left or right of the steering wheel i cant remember its yellow. when you put it in 4wd it should come on if so the cut line could be one of these other problems stated, if it doesnt come on it could still be a 4wd lineNever seen/noticed the 4x4 light.