well , the winch is almost never used, and he never uses his lights. In fact the truck is only used for trails. He's using rebuilds but he's had one new factory alternator go out. Also he's done a GM conversion due to failing alternators and had the same bad luck several times. So at this point in time it's doubtful it's the alternator, the last alternator probley had less than 2K miles on it.
1995 D90sw #51 (Converted to ST)
2006 LR3 HSE (untouched... for now)