ABS and Brake light
 

Hello all.. First time posting on forum so bare with me. I just bought a 98 Audi A8 quattro. Of course a month after buying it the abs light comes on as soon as I start the car and then there is a terrible loud beeping and the brake light flashes. I read in other places around that it is prolly a module. I purchased one from a used car parts place and it does the same thing. Is it likely that the new one is bad 2 or could there be something else wrong 2. I have no communication with module in vagcom. I checked the 4 main wires to module.2 large browns are good grounds and the 2 large red wires do have b+. I do not have a wiring diagram for this car so im not sure which wires go to the DIP.Thanksin advance for any help...Jonathon