What exactly does the ABS warning light cover?

The lights on and it's apparently set a code because it won't go off. Just want to get the low down before I take it to the dealer.

I had it in the snow this last week, did a lot of 4x, and about 100 miles after I washed it the light came on. I've checked the connectors and all was well with them. Didn't know if there was something else to check.

Thanks, Doug

C'mon guys I need a reply before tomorrow.

ABS light on means a code is stored. Any failure/malfunction in the abs system/sensors will turn the light on. Take it in and have em fix it