Well some TJ's do have ABS, our 97 does. There are 3 fuses that can shut down the ABS and it's lamp, #2 and #3 in the under hood box, and I think it's #10 in the under dash box. I would check the fuses first.
97 Sahara, 74 Renegade, 72 CJ5, 55 Willy's (the Beast) Boss 302, 6:34 gearing, Bose 901 speakers.
God I miss that Jeep. Forgot the kinda Jeep, 80 SX4.