I have recently bought a beautiful 1995 civic cx but it came with a few downsides right a not so great job at doing a b18c1 swap. It has the updated obd1 ecu with no led light and I can’t seem to find the diag port on the passenger side but I did find a blue port under the dash it has the numbers 94/12/21 on it and has 3 black and yellow wires, 2 solid yellow wires, 5 red and black wires, and 2 solid black wires going to it with nothing coming out what is this for ? If this is not the diag port then what wires do I bridge? On the ecu any serious answers accepted thanks!

 

Thats not it, that actually looks like the plug that plugs into the ECU..!

 

What ECU are you running?

 

I’m running a p72 but I had found the ports that I need to Jump as the guys that did the swap wedged them between the side wall and the blower motor above the ecu with fxking foam tape so I guess they one day I’ll have to go through the car and fix some stuff but until then I’ll just have to deal with it. But I guess that what I get for not looking into the car more when buying it for a lump sum.