Welcome to the garage. With the ABS light on, a fault code will be set in its memory. So it will need to be scanned to know which part is failing. Just changing parts without knowing what is faulty can become expensive.
JEEP Grand Cherokee 4.7 Lmtd 2004
HID 8000K in low and fog / Quad Squad member
KYB Gas-a-Just shocks / Pirelli Scorpion ATR 245/65/17 - Transgo reprogramming shiftkit.