Cab controller module

[schISM]

The ecm update enabled the engine brake access to the brake lights. My Pete did the same thing when I went from the original cal. to an updated one. Switched back to the original cal. and no brake lights. Had it to the dealer for an o-ring campaign on the oil cooler and they wanted to do an ecm update also so I told them ok as long as they make sure the brake lights didn't come on with the Jake, they said no problem. Now it's good no matter which cal. I'm running. I'd have 'em plug in and switch it before digging through the harness any further.