Does anyone know how much it costs to fix the electronic four wheel drive on a 1993 Ford Explorer?

I have a 1993 Ford Explorer with push button four wheel drive. When you push the button nothing happens. I am not a mechanic so I would like a ball park of how much I would have to pay to get it fixed.Does anyone know how much it costs to fix the electronic four wheel drive on a 1993 Ford Explorer?its probably the actuator which doesnt cost that much, but I would check your fuses first