Gave everything a test run tonight in the car. Works perfectly until I add the signal amplifier for the wheels. When it's in everything goes whacky as soon as the circuits supposed to be 'off', power and ground running where they shouldn't. I assume I need to control the common anode from the signal amp in the same fashion. Which I think means I need another relay.. and the things are not exactly cheap or small either. Each relay is only rated 5A. Safest course of action will be to add a 2nd I think. Which means more time until I can call this project done.
Still.. I'm getting closer. The whole thing worked on the front of the car tonight.
