I have just installed the eco hitch and tekonsha trailer harness (supposedly for Model Y 2021). After connecting the tester for the harness, I am getting turn signals working ok but brakes do not work. There were some reports of this on YouTube (in comments) but so far I have not seen any suggestions. Does anyone know how to fix this? I can get a different harness but would prefer to make this one work since the bumper and interior panels are off for the install.
Thanks!
Thanks!