Changed battery now wont start

pulling the battery wire is the worst thing you could do
st it energized the immobilizer
next it is a good way of blowing the alternator
to check if the alternator is working simply put a multimeter across the battery terminals

power TO the alt. is probably not there . turn on the key ( don't start ) check the terminals on the plug at the alt. there should be power on at least one terminal if not , you have found the problem

Hello, it most likely has an aftermarket alarm installed, most used car dealers either give you a remote or remove the system completely. try doing this:
with the key out remove the negativw battery cable
Put the key in and turn to ON
leave the door open
re connect the battery
try to start

Wont turn over after replacing battery ??????? When you turn the key to the start position nothing happens ? Have to ask because won't turn over means something else to somebody else .
You have a engine cranks - no start or you have a no crank - no start .
Do the light's on the instrument cluster come on when you turn on the key ? Do the Headlamps work ?

Battery Disconnect or Replacement Problems

Make sure battery has a full charge. Have a helper crank it, while you visually check for spark at the spark plugs. If spark everywhere, use a gage and check proper fuel pressure. Also, check fuel injector pulse.

It sounds like you may have a bad connection somewhere. Start with your battery cables and then look at all of your ground wires as well. When you try to start your jeep see if the wires from the battery get hot.

did you see what volts the battery is? and what volts it goes to while trying to start it? should have over 12, and then over 10 while trying to start. Sounds like a battery, or... a poor connection.

the oil may be frozen? the bussing could be the noise that the starter motor makes when it either has no voltage or is not strong enough to turn the engine... keep the engine warm and change the oil, it could be seized and might take alot more work tho

One of the red wires on your battery works the power to the ignition.
If a wire has melted it`s insulation, the wire could be burnt out.
Also, repeated starting attempts will cause the wires to get very hot.
Why did you change the battery ? Was it just flat or didi you have this problem before you changed it.?