This is my question exactly. I know you and I have ACC problems, but it sounds like Pitch is fine and there is another guy on the Gladiator Facebook group who says he has no issues with ACC as well.That's weird because at least two of us have problems.
I wonder if they shipped the WRONG harness with some of these?
I don't suppose you noticed if there was a diode in the wiring harness supplied?
It's normal to have no light on the controller with no trailer connected.
But it's not normal to push the button and have dash/cluster errors and features of the truck disabled.
At least 2 of us have seen this problem and we aren't first time controller installers.
These simply plug in so it's not like you can wire it incorrectly in any way.
maybe we can get someone who has there’s but not installed to test for a diode yet. I know for sure mine doesn’t have it, I tested to make sure.