i have the 17pin connector. So i bought this one to plug into the radio.
I think you need the reverse harness. You need to be able to plug into the stock radio with the aftermarket harness (middle) then only wire in the 5 connections. Then the stock radio harness which is identical to the aftermarket one you plugged into the radio, plugs directly into your eonon unit. So you have 2 of the same harnesses in use. The 17pin is the left, the 40 pin is the middle and then the wiring diagram of course on the right.
Last edited by ryan04; 09-17-2013 at 11:14 PM.