Update on the dd1: I did a pinout on the A unit tether cable , it did not match the correct cable bc3140000 which I had on hand ,because of another dd1 repair I did several months ago.
So I borrowed that engine from my friend to check the B unit wires to the pcb ,so all good . I changed the speaker and and the audio amp ., and the A unit tether cable. Now all good everything works properly . With the correct cable it works like it left the factory lol. The diesel wiring diagram doesn’t match the dd1 wiring, in the manual . It for generic diesel only , not DD1 .
thanks to everyone that responded , very much appreciated .
fyi if you search under 20-5516-1 for DD1 it only shows the generic pd2 5 v system it doesn’t have the two cables for dd1, bc3140000, & bc3140001, However if you look in parts under DD1, the correct cables are there . MTH are you listing ?
thanks again guys