Help, car killing batteries
Does anyone know if a bad voltage regulator can cause a battery to lose ability to hold charge because it is overcharging??? I am trying to troubleshoot a problem and think that may be what is happening. Here is the story - while driving, electronics started doing weird stuff, like radio coming on and off, tachometer jumping/dropping when I hit the brake, etc. But the car drove ok. Got home shut off car, then it wouldn't restart. Jumped it and it started, but then it died again after driving for 5-10 minutes. This time, ANITLOCK light came on and it wouldn't even crank. I knew this was a symptom of the 10 amp OVP fuse blowing. That was it, but now car will keep blowing the OVP fuse when I replace it. I even tried higher amp fuses and it blows them all. It has done this with 2 different OVP relays so I'm pretty sure it's not the relay. Car will start and run ok for 5-10 minutes, then the ANTILOCK light comes on, I know the OVP fuse has blown, and car dies and won't restart until OVP fuse in replaced. And it has to be jumped to start, because the battery is dead after running for the 5-10 minutes. Alternator/charge light is not coming on. Worse still, after the second time it died, I determined the battery wasn't holding charge so I put in a new battery, and now the same thing happened to it (battery voltage read .10 volts!!!). So I've killed 2 batteries (and about 10 fuses, but those are cheap). I'm hoping this is something simple like voltage regulator. Any help appreciated.
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2005 Mercedes C230k sport sedan, 6 speed
1987 Porsche 924S - 968-engined track car
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