Electrical System Information & Tech - '61-'71 DODGE Truck Electrical System Information & Tech This page is comprised of two sections; one which has a variety of downloadable (or printable) wiring diagrams and another which has some valuable tech tips. Both should be useful in troubleshooting and upgrading your Dodge Truck Electrical System. Mopar Wiring Diagrams - Mopar Forums & Information Wiring Diagrams by Model Year Wiring diagrams are sorted by model years to make it easier to find your exact diagram. MyMopar is pleased to offer FREE wiring diagrams for all Mopar cars from 1955 through 1976. 1955 to 1959 1960 to 1965 1966 to 1971 1972 to 1976. Trucks 1968 Dodge PowerWagon WM300 1968 to 1971 W/D 1/2 or 3/4 Ton Truck Mopar Wiring Diagrams 1966 to 1971 Mopar Wiring Diagrams 1966 to 1971: 1966 Model Year 1966 Dodge Polara & Monaco - Full Set 1966 Dodge Dart & Coronet - Full Set 1966 Plymouth Barracuda - Schematic A 1966 Plymouth Barracuda - Schematic B 1966 Plymouth Belvedere & Satellite - Schematic A 1966 Plymouth Belvedere & Satellite - Mopar Truck Parts :: Dodge Truck Technical Information Dodge Truck Wiring Harnesses Wiring harnesses for Dodge trucks changed significantly from 1961-2006, some years were very nearly identical but many years are one year only. The breakdown is as follows: 1961-1966 1961-1966 Dodge trucks had a fairly simple wiring harness that was point to point without a bulkhead connector.