abs light on

ABS light can be a faulty sensor, wire, ABS module and more. The only real way to tell is to read the codes and see what they tell you. Don't bother taking it to the parts stores that scan for free. They don't scan the ABS module, only the engine related items. You need a better scan tool than that. Once you have the code(s) you have a starting point.

it's in the shop, back rear brake was making a noise, when i taking car to shop the abs light went out, that's weird.. but rear wheel is still making a noise only when the wheel is moving.. replaced back brakes bout a year ago , front brakes look good.. been good car for me..

If it went out I suspect it's a bad connection or broken sensor wire. Very common issue. The wires flex a lot and break.