This CAN communication diagnosis was supposed to be straight-forward, but the ANNOYING Mercury Mountaineer keeps moving the goal posts!
Let's not lose our patience, and continue to FOLLOW THE DATA.
Will the extremely obnoxious dinger be FIXED once we repair the ABS CAN circuit?
Also, the junkyard ABS module was NOT PROGRAMMED correctly by the previous shop, so we have to use Ford "As-Built" data with the Launch scanner to input the correct calibration numbers.
https://www.motorcraftservice.com/AsBuilt
How many curve balls can this Ford throw?
Place your bets now!
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Enjoy!
Ivan