there is a way to use a paperclip inserted into the abs connector to make the abs light blink to read the codes. looking at the diagram there is a...
-light green yellow wire that goes to chassis ground
-white light blue wire that is the output, ie the same thing as the antilock brake light in the instrument panel.
-black wire that is the trigger
There is nothing in the manual that shows how to do this but i think you put the paper between light green wire and the black wire.