I'm pretty sure that the EX-L radio just uses a positive trigger. I'd have to look at the diagrams again to be certain. If that's the case, you can pull that from the power wire for the reverse lights.How did you reroute the CANBUS functions for the reverse trigger? You mention getting it from the footwell, but I dont follow. I'm doing something similar, taking an EXL head unit and putting it in an LX and the wiring harness is keeping me from getting the reverse camera to work and I get a number of ACC red lights in the diagnostic mode for the bus functions. The LX uses CANBUS to trigger the camera, the EXL uses a pin from a diode in the backup camera system, and to get to it Id have to remove the steering wheel. Any advice is appreciated!