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Re: Question for those (much) smarter than I
how often do you drive it? if not very often, it may just be dying from non-use. it could be a parasitic drain, like a switch you didnt know you had on (the dome light?) or from a bad key switch or bad winding in the starter solenoid. use a VOM to find out if something is dragging current when eveything is off, or disconnect the battery when you park it for long periods.
generator or alternator? generators need the brushes replaced once in a blue moon, if you are starting it and nothing is charging or it is charging poorly, it could be the belt is loose or the generator needs service. if alternator, the voltage regulator could be bad, use a VOM to make sure you are seeing more than battery voltage when the truck is running.
could be your cables too, look for that white corrosion at the ring terminals, or check for a loose or poor ground to the frame or body or engine.
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