Today i was just driving and my headunit just turned off then back on and then i noticed the abs inop light was stuck on, so then i shut the car off then turned it back on and it was gone.
Then on the way home from work it did the same thing but this time all my headunit settings were gone which makes me think the ECU might have shut off..

im gonna check the battery connections

another thing.. i have an aftermarket alarm system and it went hay-wire like 2 weeks ago for no reason

 

Check the connections at the wheels. Sometimes they come loose..

Tails

 

Make sure you don't have a low voltage situation. It can cause lights to come on the dash and other things to be weird.

 

Check all the ground wires on the stud mounted on the passenger fender by the battery. If any of them come loose, you will have issues and it will kick off an ABS inop light. Mine did just that and it turned out that the bottom wire was loose on the stud even though the top ground wires were tight since its kind of a 2 piece stud.

Ken R.