How do I reset service soon light on a 1998 dodge neon

First see what code is in the computer.Cycle the key three times and stop when it in the run position. The check engine light will start blinking. The first code should blink once then pause, then two blinks.This is showing that it is in the diagnostic mode. read all codes the same way, untill it starts with 12 again. Write them down. Then remove the negative cable from your battery post,after one minute, replace neg. cable. The light should be off.If it comes on again, it has set a hard code. You must repair whatever the codes indicate. Get a list of trouble codes online at Google.