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are you able to pull the code out of it? between the a-pillar body mount and the ebcm its really common for the power or ground wire to get corroded internally due to moisture. its in the main harness running along the frame on the driver side its a pain but i would remove the conduit and release it from its mounts and follow your power and ground up frm the ebcm. But first if you can pull codes lets start there.
Any luck on this?