The alternator is likely bad. Bad is not much of a diagnosis, but the best way to check is with your volt meter when running (after a good charging so the battery is full). The throttle should be about one half or so. The voltage should be 14.2 to 14.6 volts when measured from battery terminal to battery terminal. If it is, the system is charging, but might still be taking away current when turned off. After the above voltage check, turn it off. Take the positive battery terminal off the battery and use your volt meter between the battery post, and the terminal. (one lead to each) If the voltage reads more than one volt, (or using a milliamp setting, about 120 to 150ma) there is a leak. I woud have the alternator checked at a Auto Electric shop. If it is OK, there must be a leak in some other circuit. Jim
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