2004 dodge neon speedometer stopped working

have you checked the fuses? it more than likely blew a fuse if not then maybe fried wiring from jump start.

Wife's 02 buick did that when the alternator quit working! Replaced it and everything went back to normal!

have you replaced the battery? the car draws it's electricity from the battery, then the alternator replaces the charge to the battery. if the battery is shot and will no longer hold a charge the car will not stay running once you remove the charge as in removing the jumper cables

hopefully the clamps are not reversed...

check all fuses and relays sounds like one may have blown due to a power surge

its bad plug terminals that the speedometer cluster plugs into. common neon

On our 2007 Subaru Forester, I followed the above tips but with one small difference. Instead of disconnecting the battery and waiting hours for the ECM to reset, I found on another page that the ECM can be instantly reset by disconnecting the negative battery cable and pressing the brake pedal for a couple of seconds. Worked immediately!

Make sure you have installed the battery correctly red cable on the (+) and black cable on the (-) side sounds like it may be reversed this wold cause instant battery drain.

i HAD THE SAME PROBLEM, TRY PUTING THE DEAD BATTERY BACK ON AND TRY TURNING IT OVER THE GAUGES MIGHT FLIP BACK AROUND

Try replacing the speedometer or there may be a short in the wire