I have an electrical short that keeps shooting my batteries. I've gone through 3 new batteries. Takes a few days on a new battery but once they short out truck won't start because computer doesn't get a full 12 books and won't allow truck to fire even though it turns over just fine. I've changed fuel pump, ignition switch, cam position sensor, rotor cap and button. Any ideas on how to proceed to find short?

 

I really hate my auto correct on my phone. "Keeps shorting" and "12 volts"

 

Welcome to the forum. The first thing I'd do is perform a parasitic drain test. You tube has videos demonstrating the procedure. That will show which circuits are causing the problem.