Im using the b18 harness, which is being plug into a 93 del sol harness. The two plugs i think they are (not pluged in) the fuel pump, and the ingition system. Since when i loosen the bolt on the fuel filter and tried crankin it, no fuel came out. Then i put a thin screwdriver in one of the spark plug wires, then cranked it no light/ spark from it. Ill get some pics as soon as get home from work. Also both harness are obd1 and the dizzy also.