Here is my wiring situation

[Miata Master]

OK I have an 89 s13 Auto, rb25det motor with harness/ecu/MAF, and I have an rb20 5 speed no lower harness. I know rb20 trannies are very similar to 240sx but is the lower harness the same if so I will try to find one. If not finding an rb20 lower harness is gonna suck. I plan on getting a rb25 transmission eventually. well any suggestions?

[klh6686]

try this:zerothread?id=103409

I am not sure what else is involved with an auto but maybe this can help point you in the right direction? Good luck

[BoostFab]

use the ka lower harness....!!!!!