i posted this in a different forum, but i think i should've posted it here. i cant see how to delete the original, but i'm desperate for help so i'm going to just post it here too..... Hi all. My hero and uncle sent me here for help and hopefully someone can, as i am ready to tear my hair out. i have a 98 jeep wrangler tj 4.0 liter straight 6. The alternator is not charging the battery. I replaced alternator, didn't fix it. had the old alternator belt tested and it still works. changed the battery since the old one died from the unknown (at that point) issue. grabbed the old volt meter and checked every wire, ground, terminal, i could find, include the fusible link and everything tested fine. this morning i replaced the pcm. still no luck. checked all fuses, rechecked all wires terminals and grounds..... still all fine. this is where i am at..... i do know that when the new pcm was flashed, the mileage wasn't put it properly and doesn't match my mileage in the cluster gauges. but wouldn't that make the pcm just not work and i would lose all the other components (fuel injectors... etc)? am i somehow frying the pcm's? if i got a pcm that was bad to begin with, what are the chances the "new" one would have the exact same problem. only other symptom i have is when i run it (on battery alone) after about a half mile, the check gauges light comes on and the gauge needle buries to "9", even though the battery is still putting out 12 volts (or there abouts) what in the world could i be missing here? thanks in advance folks.