Nate,

Pretty sure the wiring harness does plug into the circuit board so clean
that plug et c. once you've gotten over the flu. If that doesn't fix it try
shorting the wires together at the circuit board with clip leads. If you
still have a problem something is wrong on the circuit board. If the problem
is fixed you have a bad wiring harness.
The circuit board is an expensive replacement.

Dave M.