An elderly lady introduced her vehicle to some local car dealership because her interior lights did not work. A couple of hrs later, she had a call from her service consultant. He described to her at length that they experienced a hard electrical problem, which it would want more time than expected. A sizable part of her interior will have to be removed to be able to access some wiring harnesses.
She proceeded to authorize 4 hrs of diagnostic time for you to investigate why her interior light did not work. Several hrs later she got another call from her service consultant. Finally, they'd discovered the real cause. A corroded wire in the connector of the control module was the reason. Fortunately, the control module didn't...