Had the same issue. I changed the wiring from about 2" from the hub connector to as far up in the harness as I could get to. Soldered and heat shrink connections. Still had the problem. mentioned to my mechanic and he said the connectors go bad. I ordered this
Dorman harness from Rock Auto and fixed the problem. I would do that before you start fooling with the main brain.
FYI, if the module is bad, you can send to
Cheap ABS and get it rebuilt for $99. You are only pulling the electronic portion, not the hydraulics, so you can drive the car while the module is out for repair.