Stop buying cheap batteries. How bad does your truck bounce those batteries around? Are your wires all good?Well **** me sideways bought new batteries fall of 2017. Having charging and starting issues. Replaced the alternator twice, not any difference. Replaced all four batteries when I did the second alternator, now we’re getting them starting and charging. One battery was junk, which I suspect would cause a draw on the other three.
Using a cheap multimeter I showed a 0.25-0.45 amp draw on the negative side of the batteries. A battery disconnect may be in my future
One year seems to be my magic number on parts. Brand new parts lasting a year. Good grief
Batteries are $85 each. Core charge of $30. I guess $220 every fall we stuff in new ones