Power Issues/Seems to be related to ESP/ABS -- Audi s4

[m.s4]

So recently I have been experiencing some really weird symptoms in my car with my HFS-3.

Any time I get the ESP to turn on, or get substantial wheel-spin with ESP off the power flashes. The gauge goes dim except for the yellow water level light.

-Grounds are separated
-All wires have been double checked for proper placement
-water level sensor is unplugged

I didn't have these issues in the dry (lots of snow in MN since nov).
It also does it if i have the system off. The yellow light will come on.

It doesn't happen if I unplug my abs/esp fuse. I am investigating the problem being my car's wiring, but thought I would post here for some insight.

Thanks,
Mark