240sx Engine Harness | KA24DE Engine Harness | Wiring The Wiring Specialties KA24DE Wiring Harness includes the engine harness for an S13 KA24DE motor installed into any USDM S13 240sx. Replace the harness with a 240sx Engine Harness | eBay Nissan S13 SR20DET into S13 or S14 240sx Engine Wiring Harness Sr20 Lower Upper . $129. Buy It Now. Free Shipping. This is an upper and lower engine wiring harness to install a Nissan S13 SR20DET engine into an S14 240sx. Also appears to have the connectors to wire into an s13 chassis.