Anti-Lock (ABS) Light keeps going on and off

Hello, I have a 2004 Galant ES (2.4L)... lately, the ABS light has been on, and when it's on, my ABS doesn't work. Sometimes the light goes away, and the ABS works again, and sometimes the light is on.

Lately, it's been on pretty consistently and only turning off about once every 2 weeks...

My friend suggested doing fluid flushes because it appears to be a sensor issue. Anyone know if fluid flushes would fix this? If not, anyone have suggestions?

Check all conectors of abs behind wheel on oxidation, clean them, then check abs wheels on hubs - clean them. Dont think, that this could do old brake fluid.

You must find the error. Check the connection abs sensor on wheels. Possible bad contact in the connection.