hate to bring this back from the dead but mine is doing the same thing what was it in you case. hopefully you are still on here. mine has power to everything windows lights ect but wont crank almost like a neutral safety switch. but i bypassed that plus will blow the 80 amp fuse. long story short, what did you find wrong with yours thanks.
A problem well-stated is almost solved.
Was it doing it since you got the truck?
EXACTLY What did you do right-before issue started?
What blows the 80 Amp fuse and when?
Always indicate model-year-engine-transmission-trim
We are all over the U.S. / the world. We need to know
exactly what you see, hear, feel, smell about your issue. Describe in detail what you expect to see, hear, smell, feel when you try to crank but do not. Every little click, beep, buzz, etc.
What does your engine compartment look like?
Does it have a starter relay? Where? What color?
A picture paints a thousand words.