Getting the abs code?

My abs light is on and my abs inst working and Ive tried everything I can thing of to get the code but nothing has worked. The scan tool told me to jumper pin 4 and 8 with a multimeter and it will flash the code in volts but that didnt work, all data told me to ground pin 1 and it will flash the code on the dash light and that didnt work. Anyone else have the same problem or know how to read it?

autozone man! They scan for free

problem isnt scanning. I got to school for auto tech and I have access to at least 3 scan tools all over $5k lol. Aparently you cannot read an abs code directly from a scan tool, you have to jumper something and it will flash a code at you. my problem is I followed every set of directions that I could find on how to do this and nothing worked. So if anyone has ever had to do this, I'd like to know how