Trying to track down a ground problem I suspect is causing ABS warning light, no brake lights, and strange starter hesitation problem, wouldn't it be great if it was ONE thing to cure TWO problems?? I have searched and gotten some good info but I'm not sure I have found the right thing. Is it under/medial to the underhood box containing the K40 module (relay)? ($170 is too much for a relay but cheap for a MODULE)

I have replaced the stoplight switch already, and the problem is not consistent. Turning the steering wheel lock-to-lock did seem to help at one point but no longer. If you know where is/how to access the steering position sensor pls include that info.
TIA!
-Tom