My 1996 Jeep Grand Cherokee started beeping and telling me to check the battery. So I had the car tested and it said the voltage regulator was bad.
The voltage regulator on these Jeeps are in the PCM, so I had to bypass it with another external voltage regulator rather than replacing the $200 PCM.
Now that I have replaced the regulator, and gotten a new battery, the voltage gauge is going all over the place. But when tested, the battery is being charged by the alternator at a perfect amount.
Now overnight the battery is being drained somewhere and dying. I don't know if it could be the new external voltage regulator or a shortage.