My 1996 Jeep Grang Cherokee just started acting up, first the battery gauge kept dropping to 0 about a minute after starting, now it will not start without a boost and the second I unplug the battery it shuts off; I had the battery checked @ Autozone and it is good. Can anyone help please?

check alternator - should have 13.5 to 14.8 volts when running

It may possibly still be the battery. While the windows and lights, etc. may have worked, those require a small output from the battery. The same problem happened to me when I left my trunk open for a long period of time. The engine requires a much higher output from the battery, so while your inside electronics may work, the battery may not have enough charge to start the engine. Connect a battery jumper box to the engine and again try to start the car leaving the box attached. If it starts, keep the box attached for a few minutes and allow the car to run. The battery gauge on your dash should also indicate whether or not your battery has enough juice.

you will haft to take it to the jeep deller and have them scan it to check your pcm wich cuntrols your voltage

oil pressure relief valve is a possibility or the oil pump is worn ,either way its a sump off job

Try replacing the engine relay switch. It is located under the hood with the other relays. If not check the wires for ground. Check the battery cables , especially the cable that goes to the positive of the starter.

Alternator......period.

Your welcome, will get back to you a.s.a.p. Let me know what happens if/when you disconnect that battery temp sensor.

Sounds like the starter is going out. Autozone will check those for free. It's just 2 bolts mounting the thing. It's under the passenger side rear of the engine. Undo battery, those 2 bolts and keep track of which wires go where. Run down to Autozone for a check or a new starter.

yes have the battery tested make sure all battery cables and posts are free of corrosion and tight!!,,which is a big deal,check air filter and carborator,

check the solenoid and the wires going to it