Brakes Clicking

okay, i have a 1992 pontiac sunbird 4 cylinder engine. Everytime i start the car, after a second the black box by the master cylinder clicks and the abs and brake lights come on...so, can anybody help me on what this is and how much it would cost to fix it?
Thanks!!!

when you start your car, the abs does a self test to make sure everything is alright with the system. If the light came on, and stays on, i would suggest cleaning the sensors. If that doesnt solve the problem, take it in to the shop.

i think that relay ur describing is the relay for the fuel pump.