I understand that there is already a thread on this, but I have different questions. My 79 Volare has rear defrost and cruise control. I had ordered a wire harness which was said to be from a 77 Diplomat. I am noticing that the firewall plugs are backwards (volare is female, diplomat is male.) The Diplomat does not have the same options as the Volare. What I am trying to figure out is how much I would have to change for the firewall plug and how I can add the wiring for my Volare's options. Did I get the wrong year wiring harness? Thank you.