CEL
P07 - A13 --> light --> fuse 15
P0_ - A13 --> light --> fuse 15
same pathway for VX and others. No idea why it wouldn't work.
Do you have a standard light or LED in the cluster?
When I went to a LED I had to use a loading resistor to get the light to work properly. I've noticed some ECUs are more sensitive to this than others, and some work without the load resistor.
B8 - Power Steering switch input
what it does with that info, I have no idea.
it's a ground active signal to indicate pressure in the line at the rack. (or maybe too much pressure, the manual is unclear)
note: VX's didn't come with power steering very often, the input may not populated.
not sure if that's any help, but it's info.