Here's a breakdown:
* Early 1900s to 1950s: Most cars used 6-volt systems.
* Mid-1950s: Some manufacturers, like Chevrolet, started introducing 12-volt systems for specific models and features like power steering and headlights.
* Late 1950s and early 1960s: The transition to 12-volt systems became more widespread as manufacturers recognized the advantages:
* Increased power: 12-volt systems provided more power for accessories like headlights, windshield wipers, and radios.
* Improved starting: 12-volt systems were better at turning the starter motor.
* Reduced wiring: 12-volt systems used thicker wires, reducing resistance and heat build-up.
* 1960s: By the end of the decade, 12-volt systems had become the standard for most cars.
However, it's important to note that:
* The transition was not simultaneous across all manufacturers. Some companies like Ford continued using 6-volt systems for some models until the mid-1960s.
* Some cars might have had a hybrid system where certain features used 6-volt and others used 12-volt.
Therefore, the exact year a car transitioned from 6-volt to 12-volt depends on the make, model, and year of the car.
