Wife's 03 GT ABS light on and Traction Control problems

Get under it and check the wiring at the ABS sensors by each wheel.

Something probably got damaged during the off-road adventure.

YEH TRINITY IS RIGHT, MY WIFE HIT A CURB AND IT ACTED THE SAME WAY. LOOKED AT THE SENSOR AND IT HAD A SLCIE IN IT, REPLACE FOR 40 BUCKS AND HAVENT HAD A PROBLEM SINCE..

Does the vehicle align properly when put on the rack?

Find someone local that has a Ford IDS scanner and see if their scanner can communicate with the ABS control module thru the OBD-II port under the driver's dash.

If you are unable to communicate with the ABS computer I would suggest you replace the computer with a junkyard model (got mine for $125 from a 80k car). Make sure you get the right model. I used a 2000 GT module for my 2002 GT. It will say "GT TRAC" on it.

Please check my YouTube channel with the same username, I made a video on exactly how to swap out just the brains of the ABS module without breaking open the brake lines.

Your problem could be as simple as just needing a new ABS sensor on the respective wheels and/or tone rings on the hub.