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This is a wiring diagram for the 1957 Plymouth V8 all models. This wiring diagram is very clear and readable, it comes with complete wiring parts and connections.

Among those parts you will see components like: current regulator, voltage regulator, distributor, oil pressure switch, starter solenoid, ignition switch, heater & defroster switch, direction signal switch, etc. There are also color codes shown here, they refer to the color of the cables, they are like black, blue-white, orange-black, etc.

Be sure to read and understand this wiring diagram first before performing any wiring work. Save this wiring diagram in your PC for future wiring work, right click on image, choose save image as, choose saving location, and save into your PC.