88-91 All the Wiring Information You Could Need is in Here. Feb 05, 201988-91 All the Wiring Information You Could Need is in Here. If this is your first visit, be sure to check out the FAQ by clicking the link above. maybe we can make it a thread where we post all the wiring colors or diagrams for future reference instances Rywire : Budget D & B-series Tucked Engine Harness OBD1 Budget D & B-Series Tucked Engine harness MADE IN THE U.S.A. This harness uses Mil-Spec Teflon coated wire with a maximum heat rating of 200°C. Our D-series and B-series compatible wire-tuck engine harness is nearly identical to our Mil-spec engine harness line with the primary difference being, the single black wire color and expandable loom.