i was coming back home from a 200 round trip when the check gauges light came on, everything was normal except for the voltemeter gauge, it was all the way down, but the car was running ok, about 20 miles later died, i was able to jump start it twice but it didn't hold any charge, towed it back home and the next day replaced the alternator and jumped it and started, but today the light came back on again so i also replaced the battery end the terminals (just the ends) test drove it and it happened again, i'm lost, what should i do next, thanks in advance.

 

Test the battery and alternator. Actually test them, don't just throw parts at it. You can get bad alternators from the store.

Check your ground connections. All of them.

 

how many grunds are there and location, thank you.

 

You have several grounds on your jeep, the one is at rear of valve cover, which goes direct into wiring harness/ecu the others will be located on the cables going from the batt and one goes from the rear of the alternator, there are a ton more but those would be the ones i checked first. and test your battery and alternator.