Wiring Harness Conversions for Honda & Acura Engine Swaps Also called a Dual to Multi Point Conversion Harness. Required when swapping on a 88-91 Civic/ CRX "DX" Model *Core Required. For D16, B16A, B17A B18, & ZC Swaps. Note: Standard harness does not include VTEC wiring so if you are going to be wiring in VTEC your self or not using a VTEC motor select standard harness conversion. *SSR 88-91 Honda Civic/ CRX. 2 point to 4 point wiring Click to view on Bing3:10*SSR 88-91 Honda Civic/ CRX. 2 point to 4 point wiring harness conversion install referance SwapShopRacing. Loading 1991 Honda CRX Si - Duration: 7:44. RegularCars 697,435 views. 88-91Civic CRX DPFI to OBD1 Author: SwapShopRacingViews: 29K HOME | cjswiring honda-tech as crx_si-r. nwp as crx_si-r. az-ht as crx_si-r . But anyhow I started wiring up my own engine harness for my 90 crx dx (mpfi converted) when it became clear I'm never going to find a clean harness for my car. So I set out to make my own. And from my build page I was confronted with others who wanted the same.