1970 Chevelle Wiring Schematic | Free Wiring Diagram Variety of 1970 chevelle wiring schematic. A wiring diagram is a streamlined traditional pictorial depiction of an electric circuit. It reveals the elements of the circuit as streamlined forms, and the power as well as signal links in between the devices.Author: Ricardolevinsmorales 1970 chevelle wiring | eBay Find great deals on eBay for 1970 chevelle wiring. Shop with confidence. Skip to main content. eBay Logo: Shop by category. 1970-72 Chevelle / Monte Carlo Speaker Wire Harness 4 Speaker Stereo - OEM (Fits: 1970 Chevelle) Brand New. $86. Buy It Now +$10 shipping.