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When the vehicle has an unacceptable amount of parasitic current drain, remove each fuse one at a time 22. Repeat the parasitic current drain test procedure after any repair has been completed to make sure that the parasitic current drain is at an acceptable level. 23. When the cause of the excessive current drain has been located and repaired, remove the J-38758. 24. Connect battery negative cable to the battery negative terminal. BATTERY COMMON CAUSES OF FAILURE A battery is not designed to last forever. With proper care, however, the battery will provide years of good z A vehicle accessory was left on overnight. z The driving speeds have been slow with frequent stops with many electrical accessories in use, z The electrical load has exceeded the generator output, particularly with the addition of aftermarket z Existing conditions in the charging system, including the following possibilities: A. A slipping belt B. A bad generator z The battery has not been properly maintained, including a loose battery hold down or missing battery z There are mechanical conditions in the electrical system, such as a short or a pinched wire, attributing to Electrolyte Freezing The freezing point of electrolyte depends on its specific gravity. A fully charged battery will not freeze until the Battery Protection During Vehicle Storage opened to change a fuse. NOTE: Removing fuses, relays, and connectors to determine the failure area may
2004 Hummer H2 2004 STARTING & CHARGING SYSTEMS Starters - H2
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