Hi guys, i've searched this topic already but no one has seemed to find the exact or fixed the problem? I have a 93' dc2 vti-r.

When i turn on my car especially if it is cold i get this buzzing sound coming from the abs unit and it will buzz for like 10 secs, then it will stop, then randomly buzz only for like a 1-2sec then go away?

What could the problem be? if it's even a problem at all?

Also, sometimes my abs light will stay on when i turn the car on? Any known reasons?

Thanks in advanced guys!