yes, the threads are clean, the washer is clean, everything is clean. good grounds from batt to block, block to frame (both 2/0), and thought good ground from block to firewall. question: if I had already fried my alternator, would that be the cause of the ground going bad to the frame and firewall? did you look at the numbers above that I just tested? somewhere I am getting a voltage drop. just tested again on the ballast because I have run the battery down by running, and the test showed batt-12.12, and with key in run position 11.14 at ballast (run side).