conversion harness


Senior Member
i have a 91 honda hatch standard (stock 4 speed) and i am using the stock dizzy plug that has 1 square plug and 1 round plug, i am making a adapter harness to obd-1 engine loom dizzy plugs, my issue is this the 2 wire connector is easy to figue out but my square plug has 5 wires and the obd-1 has 7 what 2 wires do i have to redo?? and i have looked in reference and have not found anything. this is what i have to run off of


You need to add the CYP cylinder position sensor wires.

They are Blue/Yellow & Blue/Green (look at the wiring from the OBD1 dizzy)