So I bought a 1996 Honda Civic EX with a mini me in it. The The person before me didn't know what they were doing and it was all sorts of messed up. I am almost finished with it but I have one last problem. The new wiring harness I put in there is an obd2a harness. The fuel injectors are OBD1 so the connectors on the new harness don't plug in .I'm hoping to just kepp the fuel injectors that are on there and just cut the wires from the old harness. The wires on the old harness are as follows: red yellow, brown yellow, blue yellow, yellow yellow. The fuel injector wiring on the new harness are as follows: red yellow, red yellow, yellow yellow, yellow yellow. So I'm not exactly sure as to what I order to put the OBD1 wires to match properly on the obd2a harness. Any help would be greatly appreciated .

 

The yellow/black trace wire at each injector plug is the 12v+ wire for each fuel injector... the other wire found in each plug is the ground that is provided by the ECU. Beginning at the timing belt end of the engine, injector #1 is brown; injector #2 is red; injector #3 is blue and injector #4 is yellow. If you change one plug at a time, it will not matter what the wire colors are in the OBD-1 fuel injector clips because you have replaced them in a protective, sensible way.

 

If it were me in this situation I would just buy a obd2 to obd1 injector adapter harness and be done with it. They aren't that expensive and you don't have to worry about wiring, cutting or splicing. It has been awhile since I looked into it, but I think you can depin the obd2 injector clips and repin them into the obd1 injector clips, which would prevent you from have to do any wiring (don't hold me to that).

If you don't want to spend the money then doing what is stated above works as well, this was done on my EM1 (prior to me buying it). I later purchased an adapter harness to go from obd1 to ev6 style when I installed my grams injectors, rather than cutting & splicing the wiring again.