I have a 2002 aurora.I bought it from a buddy who said it had a problem with the battery draining if you leave it hooked up after you parked it.so yesterday I charged the battery put it back in the car tested all the fuses to see where the drain could be coming from and all the fuses tested fine.so I tried to start the car and all it does is click.the lights inside come on and the battery is fully charged.someone help please!!!

What do you mean you tested the fuses to see where the drain is coming from?

I had gotten my dad to come by with a circuit tester I believe it'* called.and pulled the fuses one by one to see if there was something still drawing power from the battery once the car was turned off.none of the fuses he pulled made the tester light go off.

Then its possible you have a bad battery, bad alternator or both.

Even though the battery may be fully charged, it still may not have enough cranking amps to start the car. Have the battery load tested, or get another battery.
Have you tried starting the car by jumping it?

Ok thanks guys.no I have not tried jump starting it yet.it must be a bad battery atleast cause I've had it hooked up to charger all night and it said it was 100% and I went and got it tested and they told me it still needed charging

The battery was bad.I just went and got a new one and put it in.now it try to start but still won't.

Just cleaned put the throttle body with throttle body cleaner and it started for a minute but died.whenever I squirted throttle body cleaner in it it will start and run for a few seconds

Then you have a fuel delivery issue. Verify fuel pressure with a fuel pressure gauge when you turn key on.

Ended up being a bad fuel pump relay