I need help. Truck would not crank or start.Both batteries tested at 11.3 v. Got new batteries. Still no crank. Was able to jump starter, but still no crank. Took to dealer. They said no power to ecm. Wanted $900 to put in fuse block in engine compartment and then they could run further tests. I bought a fuse block and will put in myself. Question. Utube says I cannot reset truck by tying pos and neg cables together. Is that ok.?