When the ABS is used under hard brakeing, or slick conditions. It sets a code from your ECM. Its is nothing to be concearn

ed about. On Ford`s you need to disconnect the negitave treminal for atleast 2 minutes. This will clear the codes.
If the problem percist then you mey have a historical code, which may mean that the ABS sencer is not operating proplery..
Get someone to scan your Tour if you still have a problem.