Battery is fine.aux power works.Engine wont turn over,small click when I try to start.Gages seemed crazy for a bit.fuel light came on,then fuel gage came up. could it be the alternator?belts are fine.

check for a vacuum leak in the small rubber hoses.

battery terminals dirty (no maintenance on car?)
start at the head lights. they are hot all the time.
if the head lights fail , fix that first. (easier).
not sure what crazy means.

and 1st is to check all fuses, in cab and under hood.

it could be a weak connection to your battery. try cleaning out the posts on your battery and the post connectors.

Brakes don't work when I try to stop while making a right turn.

This problem drove me crazy for 2 weeks. Then the car just stopped running. It would turn over but it would not fire. I replaced the crank and camshaft sensors. That did nothing. I replaced the ignition switch and the car started right up. So if your dash indicator lights start doing a light show for you and your gages jump around or just stop working. Try replacing the ignition switch.

same thing happened to me, with a 2003 neon sxt..... but tranny went into error and wouldn't shift out of first til i reset the engine error, tranny and gages were fine (til it got cold). i had to warm the car up, reset the error to go anywhere. i was told it was the drivetrain computer. but i'm still checking other things.

Like you said, battery may be flat. You can check that with a multimeter.

Next check the alternator. Faulty alternator leads to uncharged battery.

CK THE BATTERY & CABLES.SOUNDS LIKE U HAVE LOW VOLTAGE

have you had the battery checked or tried to jumpstart it?