1984 Cadillac Seville draining battery
 

Hello fellow caddy enthusiast. I seem to have an electrical issue with my 84 Seville in the past week I have installed 4 new batteries the battery seems to last about 24 hours or overnight and the battery is completely dead by the morning so much so that even my noco smart trickle charger says that the battery is bad so I put it on my old die hard charger overnight and the battery does not charge beyond 9.7v. I have done this with all four batteries to no avail I even had the last couple batteries tested before leaving the store. I am tired of buying batteries and I want the old girl back healthy again she only has 63,000miles on her. Nothing is getting hot and far as I can tell nothing is being left on. My question is what could be causing such a drain that it is frying battery cells but the battery is not getting hot? She starts right up and runs like a top but when I park her for the time being I have to disconnect the battery. Please help I am out of ideas. Thanks in advance.

Did u get answer?
 

Did u ever find answer? I also have 84 caddy. Would love to know where u are getting best advice. I’ve tried FB forums. No luck yet.