I have a 2002 DX Civic coupe. Someone did an auto to manual swap. My ECM is from a 2003 civic EX. My dash lights do not work plus I would like to have a tach on the dash.
I am planning on replacing the under dash wiring from a 2003 Civic EX sedan.
The only problem I foresee is the couple has 2 tail lights and the 2003 sedan has only 1.
If anyone has any comments on doing something like this feel free to chime in.

 

Have you tried simply plugging in the full instrumentation cluster without changing any wiring ?

 

I tried today, nothing in the dash worked.