I have been trying to find this and no one sales it. Do i really need one? I bought the Honda civic 1993 Service Manual and every problem test ask for one of these test harness. Book is pertty useless without one. I have heard you don't need one and can just test dirrectly to ECM, is this true? Is there a poor man's test CHART where i can test A1-A26;B1-B16;C1-C12;D1-D22 dirrectly to ECM? Thank guys