Cadillac: 94 cadillac eldorado, cadillac eldorado, abs light

Question
my abs light stays on in my 94 eldorado, this happened after my brakes where changed at a shop and my security light stays on while im driving the car also. I also wanted to know how to reset the onboard computer and get the error codes?

Answer
The ABS light is on because someone who changed the brake pads most likely partially unplugged the electrical connectors at the wheels. check them.

Codes:

ignition ON.

2. Simultaneously push and hold the OFF and WARMER buttons on the climate control panel for 3 seconds and release them. The fault codes will appear in order.