So up to The sunshine, There is certainly 12V. But then there is the light as well as the diode that provide it back to about 1V. That 1 Volt is required to provide the alternator the sign to start charging. These are definitely tuned especially for cars running at https://4ageblacktopengineforsale50257.blogproducer.com/39356958/about-toyota-4age-for-sale