1990 - Battery being drained - help??

This has been an ongoing problem for quite some time but it comes and goes, very very weird. I did notice last night when it was very quiet in the garage, after I shut off the van that there was a low level type of hum or buzz, kind of what it sounds like when you're standing under a big stadium light (although not that loud, just the same type of sound) To me it sounded like it was coming from the rear near that air inflation system that the van has. I know it's got to be that buzz that is draining the battery.. Sure enough the next morning, it was dead. I've tried removing fuses and what not but it's still doing it.

Does anyone have any idea what this could be? It's driving us nuts. Recently the alternator went, and we replaced that. bAttery is fine,, what could it be?

This has been an ongoing problem for quite some time but it comes and goes, very very weird. I did notice last night when it was very quiet in the garage, after I shut off the van that there was a low level type of hum or buzz, kind of what it sounds like when you're standing under a big stadium light (although not that loud, just the same type of sound) To me it sounded like it was coming from the rear near that air inflation system that the van has. I know it's got to be that buzz that is draining the battery.. Sure enough the next morning, it was dead. I've tried removing fuses and what not but it's still doing it.

Does anyone have any idea what this could be? It's driving us nuts. Recently the alternator went, and we replaced that. bAttery is fine,, what could it be?
Your self-leveling system is leaking, and compressor keeps running and tries to keep pressure in system. Compressor is connected so that it is always HOT, I don't know where the fuse is. I think searching this forum could give you some help, as I remember reading somebody else having the same problem.
I have same kind of problem with battery, but I don't have self-leveling suspension to blame :frown: