Like Epstin noted, the SOHC and DOHC harnesses are the same. There are no differences between the two. Let me get this straight, you have a SOHC S13, w/ a SR swap, w/ a DOHC cluster, but the cluster is not working. Have you changed out the speedsensor? You are not able to use the SR speedsensor, you have to use the USDM s13 (SOHC or DOHC) speedsensors.