Beautiful Obd0 To Obd1 Conversion Harness Wiring Diagram Wiringdiagramsdraw (https://wiringdiagramsdraw) - Trend Obd0 To Obd1 Conversion Harness Wiring Diagram Efcaviation Com Best image uploaded on Friday, December 7 2018 by . this picture size is 910 x 910. to download this image, you can hover on image above then right click and save as. Converting the wiring from OBD0 to OBD1 - performanceforum A conversion harness is a "interface" loom that plugs between the car's OBD0 loom and the new OBD1 ECU. Additional wires are also required for items not part of the original car. Here are two sources of conversion harnesses; " jkobdconversion " and " locashracing ".