I'm trying to run the reverse gear wire on the back of the HU to the reverse wire so the HU will switch into camera mode when I put it into reverse.
But I can't figure out why it's not working... I tried splicing the HU wire into the reverse wire and that didn't work. I also tried applying a charge directly from the HU to the battery and that didn't work either.
What am I doing wrong? It's an App Radio 2 (SPH-DA100)