Ok so i bought a brand new battery and i put it in yesterday and drove the truck all day. Unplugged the positive cable overnight because i was under the assumption i had a drain somewhere because i killed an optima red top. it was about -7 over night and the brand new HD 950 cca farm implement battery was dead as a door nail. I thought I maybe got a bad battery. Lucky me. So I took it back to the auto parts store and they tested it and said it was good. They charged it up for me and said to bring the truck their with the battery in it and they would test the alternator, starter, and charging system. Turns out the alternator was not charging the battery and while the truck was running it was pulling all of the power from the battery. I had just replaced the whole engine wiring harness with one from a 92 and since dodge changed the charging system to and internal voltage regulator in 92 i had to wire mine in. If i had wired mine in incorrectly could that be the problem. Also could I have simply missed plug somewhere when installing the new harness because the alternator was fine before hand.