1995 Chrysler LHS

Electrical problem
1995 Chrysler LHS V8 Two Wheel Drive Automatic 120000 miles

Okay, here's my problem. I recently received my fathers 95 lhs after he passed. It has many problems. I believe they all may be linked. First the heater does not turn off. Since it is summer now I had to pull the fuse just so I don't sweat to death. Second the radio acts crazy. There is no lights on it and the buttons do whatever they want to. If you hit seek it may eject a cd or switch to am. This problem is with every button too. I don't even try to use the radio cause every button does something different all the time. It just seems like there is some kind of major electrical problem or something. Third I can't lock the doors cause when I unlock them with the key the alarm goes off. I have to keep turning the key in the door to stop it. Its very annoying. Is there some kind of bad chip or something? Could it be a problem with the wireing? I have no clue where to even begin with getting this fixed. Its a good car and it was my fathers so I would like to keep it. Please help. Any advice would be much appreciated.
July 24, 2009.

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