On the 2020 cascadia there is the black connnector that i connect to your harness but there is 3 more connector, a blue, Green, and yellow, what are those connector for? And im doing what whit them? Thanks
February 12th, 2020
Those do not connect. They are options for the factory radio only. A aftermarket radio has no provision for these. They could be sleeper controls, steering wheel controls etc. Just leave them unplugged and tucked away show they want short. If you wand to test before you install the aftermarket radio, unplug everything that will not plug into the BT ISO DIN from the factory radio and see what stopped working. This can be done even before you install anything. This will give you the choice to see if you can switch to a aftermarket radio and not loose something you really need or want.