ABS light stays on

ABS is just an electrical control placed on top of the brake system. First diagnose the brakes, Caliper, hoses and all other hydrualics. If they are good you need to get the code read. This will tell you which part is NG.

You did front and rear? Which is locking up? When you have them Tight. Open the bleeder at the affected wheel. If it then spins free, you have a bad hose. If not, you have a hydraulic problem still. Tell me ALL the parts that were changed.

Have someone scan your car for you, the abs code should show up and point you towards the problem, if the light is on, there should be something stored in there, don't replace parts until you have an idea. Abs systems can create weird braking issues sometimes, especially if a wheel sensor is faulty, info below, is that your problem?

Anti-Lock Brake Indicator On After Vehicle Starts to Move or False Cycling of Anti-Lock System

Possible Source(s):
 Circuit.
 Sensor.
 Anti-lock brake control module.

Action(s) to take:
 RETRIEVE DTCs. REPAIR as necessary.