Can anyone tell me how to read the troublecodes on my 1980 Cutlass Supreme 260 V-8? I have the manual, I found the ECM in the right kickpanel. It says there should be a green groundpoint with a white/black wire you ground to flash the codes. I dont see the ground point or the wire. Is it inside the dash? Do I have to remove the glovebox door to access it? Any help would be appreciated....Thanks.