First at all:
You can find on the internet the Kenwood service manual. The problem is that there is no navigation part on the scheme. It is presented only as a module.
The missing parts are probably resistors. I have this parts in my board too, the same like ORAK. When I'll go back to home I'll check it out on my navi board. Most probably the navi board are the same. The difference is in the software.
The second thing - you soldered black and red wires to the navi board.
On the pictures You showing us any black and yellow wires are connected near any harness. Could You explain what You exactly doing? Maybe show any photo whole unit with cables. Especially cables from navi.
EDIT
OK, ORAK has the values of resistors, but for sure I give in this place:
First, smaller - 1k
Second, bigger - 10k



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