Thank you for your reply RL60737 and TWO CTER. Yes, I will be using the adapter harness, but I'm just curious about what the wire does or was supposed to do.
I had not thought about looking for any nav. wires. I will look into that tomorrow when my "old man" back recovers. Thanks for the hint, 180.


And thank you MMZ_TimeLord for hosting these pdf's that are so vital to me.
Pete