Traction/Skid Control Malfunction?

I have a 2007 Jeep Compass. I don't normally drive it as my father in law drives it.

I drove it tonight in slippery conditions (snow) and the rear feels like it wants to come around on me. My FIL says it does this in rainy conditions as well.

It'd almost like traction/skid control is malfunctioning and is applying the brakes when it shouldn't be. I tried turning off the ESP but it didn't seem to help. Is there a way to disable it to verify whether it is the traction/skid control acting up?

A couple of times it got so bad I thought we were gonna go off the road.

Ideas and thoughts as to what might be going on would be greatly appreciated.

Try pulling the fuse for the anti lock brakes. Check what happens if it seems to correct the problem have someone with anti lock brake scanner check for codes.