In other words, with the ignition on but engine off, the indicator light sees 12 volts from the battery (via the same wiring that goes to the ignition terminal #15 on the coil), and nothing on the other side so it glows, but with the engine running, it also sees 12v (actually 14v since the alternator is now spinning) both sides of the bulb.. I added a video explaining my wiring of a 1974 VW super Bug. This is a alternator with external regulator.
The voltage rectification circuit of the 1974 Volkswagen Beetle alternator wiring diagram is responsible for taking the low voltage output from the alternator and converting it into higher usable AC current. This process is achieved using a diode bridge that routes the current between two separate paths. When the field current is supplied to.. 9 FUSES — 1973 AND LATER 16 2mpete Rea Window foggertelay air fan Wirdshield nipers 8 ampere Brake lights Control valve (auto. stick shift) belt interlock