I have a sr5 Zenkie coupe and Im doing a gts swap but everything i have so far is from a gts zenkie coupe, so can I use a kouki coupe under dash harness in it? thank you

No ideas?

You could bypass all that junk if you want and just get the other 16v ECU plug that is on the body harness and give it power and ground. Then wire in a relay for the fuel pump. IIRC, I think that plug is just like ECU power and a fuel pump relay control wire, maybe some other bs thing and that's it. Makes getting all those GTS harnesses meaningless as long as you have a 16v engine harness, that's all you really need. Wouldn't matter what underdash or engine harness for that sense.

I have a few 16v engine harnesses I have laying around that I was going to make into SR5-GTS conversion harnesses when I got bored.

swap over all the wiring and the washer motor and you will be good to go

Max