What is making my 1992 Buick Roadmaster Limited Sedan battery is draining with the

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mrfreddyfenkell

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car off? All of a sudden my cars battery is draining over night. What could cause this to happen? I have an updated sound system installed and I thought that was the problem so I disconnected everything and now it’s just the standard car without a radio or anything extra attached and the battery will drain over night. All the lights are out and I can’t see anything on. How should I troubleshoot this problem? I have even used four different batteries (one it brand new) just to be sure I just didn’t have a bad battery. I also have an alarm with remote start; could that be the problem? I don’t hear the fuel pump running and I have standard shocks and springs for suspension without levelers.

Any suggestions or a guesses are appreciated just please help me. Thank you in advance.
The alternator!!!!! That could be it. I just had it rebuilt at the custom alternator shop and I noticed that now my car will continue to run even after I remove the battery completely hot and ground. i did not understand why it would do that.
 
With General Motors Products, it is possible for the alternator to fail in such a way that it will test good, will charge the battery, but will drain the battery over night. This problem can drive a mechanic nuts if he is unaware of this.

I would strongly suspect the alternator.
 
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