Thank you all in advanced! Just started having this battery drain recently. Started her up one evening and drove to have dinner. After dinner, I jumped back in the truck and went to start her. Nothing happened, no lights or clicking. Jumped her and she started right up and was able to drive home. The next day I went to go start her and nothing happened again. Before this issue, the starter was a little slow when cranking and so I went to oreillys and grabbed a reman starter. Also ended up replacing the alternator and battery after that. After searching on some forums, I did a few checks. I hooked up a test light to the negative cable and post, turned the key and the light came on. I pulled the fuses under the dash and the light stayed on, pulled out the cigarette lighter and light was still on, I disconnected the voltage regulator and the light turned off. Figured that was the issue so I went to oriellys and grabbed a voltage regulator, installed it, hooked up the test light again and the light came back on. I’m lost at this point. Any other things I should check out? Thanks guys!