Just as a further followup: While checking out the above-mentioned circuitry, I had ordered a spare ABS Relay assembly and decided to take my old one apart just to check out what type of aging and wear I might find on the inside, especially to the relay contacts. I first noticed it was very difficult to take the cover off, but once that was accomplished, I realized it was intentionally made to fit together tight and sealed with a rubber gasket around the base. There were no signs of invasive moisture or any other contaminants, and to my astonishment, there were no signs of any wear to the relay contacts on either relay! They looked new! If this doesn't sell you on Toyota quality, nothing will. So if anyone suggests in the future that your ABS Relay might be bad...it ain't likely!