How can i wire up my 4 wire o2 sensor to my original Si harness? I have tried searching forums and nothing has come up for the ef. im running an obd1 b20 with use of a pr4 ecu and jhp jumper and denso 4 wire. Where the pig tail is supposed to be for the original 1 wire there are just a bunch of openly exposed wires because my harness has been damaged. There were a total of 5 different wires 2 of them were still good and have the connector (1) on them 1 was black with a yellow stripe and the other was black/dark green with no stripe it was hard to tell. The other 3 exposed wires where colored as followed: 1.Orange yellowish with a blueish green stripe. 2.Black 3.Yellow with a white stripe This is My 1st honda swap and have very little experience with wiring i have done a mild wire tuck on my engine bay and thats about it any help would be much appreciated!