has anyone experienced an electrical short. truck wont start in morning no battery. does anyone know where to start.

Need more info, truck year, mods, interior electrical components plugged in, etc.

I have experenced tons of em...need more info, also a short wont drain a battery a current draw will....

you definately have an amp draw somewhere if it killing both batteries over night. Should be easy to find with a meter.

thanks guys its my buddys 2006. i will see how he is making out with it . i was trying to help him out. thanks again

Step one remove all aftermarket add ons, 90% of draw problem are fixed then, the truck will try to take care of itself with rundown protection, but it can shut off accessories you hardwire.