So around the light, There's 12V. But then There's The sunshine and the diode that convey it back to close to 1V. That one Volt is required to give the alternator the signal to begin charging. “Our Remanufactured Engines will be the closest detail to some new engine out there. https://4ageblacktopengineforsale57758.blogproducer.com/39369838/examine-this-report-on-blacktop-20v-4age