Gee n5eba must have read my mind, I found the same problem with my 71 240 last weekend. She drained a new battery (600cc) in 3 days, originally I thought it was the alternator not charging so I replaced that with a reco one. May be I wired it up incorrectly:stupid: NB : Everying on my car works fine and has done for the last 12 months. I pulled all the aftermarket crap off when I first bought it. I'll try those ideas and see if I can track down the culprit.