I have replaced the light switch on this truck already, the one thats in it now is brand new!! When I pull the light switch out to the parking light stage, they will not work. If I push it in just a little the parking lights will work. Now when I pull it out to the second stage, whereas the headlights and parking lights should be on. The only thing that happens is the headlights come on. Now if I play with the switch and push it in just a little the headlights and the parking lights will come on. They wont stay on a very long time and has stopped working while I was driving. I really need some help with this one. I have checked the ground for the switch and I have checked the connects, I dont know what else would cause this?????