Brakes locking up

[Machete]

I have a 2001 Expedition just recently I have a problem with breaks locking up ( thankfully it did not happen on highway) I have been trying to find any info on this and what can cause the issue the abs and adv track have been on for a while and have been looking for parts.
The adv. track came on at the same time I found out it could be caused by a bad speed sensor, could this make the abs to stop all wheels the

Calipers sticking?