Dont know what I was thinking when you described the switch, guess I had a slight laps in my memory. This was one of the items that I originally replaced. I pulled it out and found that it was fried. Tried two additional switches and still nothing. I noticed that the wiring harness to the switch was melted as well. Thinking I have big issues. What are anyone's thoughts on just changing out the trucks complete wiring harness? I'm thinking if it was all replaced i could simply bypass the anti-diesel switch all together? Am I correct on that thought? Also ifin I did do a complete harness, any recommendations on brands?