Verified answer

Your hooked up to the wrong power source. You need dedicated D/C supply at fuse panel. aux port. Or you will need a in line D/C Filter. You mite be too young to remember driving down the road with your dad and the am radio on and every time he took off from a stop light the radio would wind like the alternator? Most of the cars that did this were GMs.

nicely the fact you suggested the subject in user-friendly terms comes whilst its chilly from what your asserting it feels like the chilly or damp is inflicting a circut to short out someplace and its draining the bat yet in user-friendly terms whilst its moist damp what i might do is administered a attempt sparkling the bat term with twine brush examine started and alt connections do an analogous with them then cover the terminals with vaseline and seal them from damp additionally it must be a lifeless cellular interior the bat see see approximately getting a bat examine the two take it get it carried out or spend a splash money and purchase a bat tester the two way it show you how to presently the place you stand with the charging equipment and batif the bats advantageous and the probs are nevertheless there examine all electric powered connections in engine bay for frayed twine or uncovered twine prolly your perfect wager

check all the ground wires from the battery cables to the grounds on the system. You can also check the alternator for too high a ac leak.