Ive got a 95 integra and my ABS light comes on when I restart the car after
it has been running and will stay on. My ABS does not seem to be working at
all.

But on a cold start, everything is fine, the ABS light is off and the ABS work great.

Any idea what may be the problem or things I can try to fix this ?

I already added some brake fluid, but that doesn't seem to work.