With a 2017 for sure and maybe others, if steering wheel harness has connector and fuse in dash fuse box for heated wheel but no power to the wheel, look for a wire in position 37 on the rear dash fuse box connector. If wire is missing get #19301761 from the dealer and plug it into connector and run to the purple/white in the harness. Can run it to the dash connector (x201 I think) but you can't hardly get to it.