Hey everyone, new here. Hoping someone can help me out a little. Ive had several of these trucks but this issue has me stumped. First of all, i have replace all of my grounds and power wires in the engine bay. Power was replaced with 1 gauge and grounds were replace with 4 gauge. I also ran a 4 gauge wire directly off the back of the alternator to the batter. This has been very irritating and id like to get this figured out before i install my electric fans and single 10 sub. Battery test 12.5 volts not running and around 14 idling with no load. There doesnt seem to be an issue until the blower motor is on high. Going to the road is fine its when its to running temp and coming to stop. It doesnt kill the truck but it definately dips down pretty low. Ive checked almost every ground i can find. Any advice or input on experiences with this will be greatly appreciated!!