I changed the dash harness because the original got destroyed but changed it and but regional owner did funky stuff under the dash just trying to put it back to normal but I have no crank no nothing but lights on dash I checked the nutral safety switch and that was ok and changed the ignition switch and still not it but no power going to the solenoid switch to engage no volts no nothing somthing stopping it but If i put a screwdriver an jump it and it fire right up but after the battery light comes on if you drive it. It will blink at you. But if the truck off an crank it with key nothing happends no noise only from the relay under the dash an abs light on and battery light on. I am lost I've been trying everything could it being the alternator could be stopping everything to work. I have good enough battery 800 heat cranking amp I know it's not alot it should be enough even when they are fully charged the truck still wont fire up. What do you think it could be?