I have an ob2b to obd1 conversion harness, all the wiring in the car is ob2b, regardless, it did work right at one time, just not now. I have been looking at voltages regarding the ELD, I checked the green/red wire which from what I have read the voltage with the key in the on position should be between 4.5 and 5 volts, my voltage is 3.76, when I turn accessories on it reacts but I don't think it leaves the 3 volt range. I tried this test with another ecu and the initial voltage is the same, not the 4.5 to 5 volt range the books says. I tried reseating the connector on the ELD, but that didn't seem to do anything for me. Don't know really what my results are telling me. I went to the junkyard today to try to find another ELD but the latest thing I saw in the junkyard was a 1995 civic, I have a 1999 civic and the fuse boxes are different. Anyone know what my results are telling me other than the fact that I am still screwed. Btw I had 12 volts at the blk/yel wire.