A-Body 1962-76 - Dart - Duster - Valiant -- Electrical A-Body 1962-76 - Dart - Duster - Valiant » Electrical » Harness. Home Catalog Home . New or Hot Selling Items. Engine and Forward Lamp Harness Engine Ground Straps Engine Harness Wiring Harness Straps / KitsDash Harness · Engine Ground Straps · Rear Light Harness · Engine Harness Body Wiring Harness - CarParts Once the harness stops holding wires together, the wires are left just lying around your car's engine bay. The problem worsens when the rubber insulators covering each wire are cracked and worn through exposed metal wiring in the engine bay, the risk of shorted circuits and current arcing is increased.