The white-with-green wire, the feedback loop from the alternator's core.
The dusty garage smelled of old oil and sun-warmed metal as hovered over the open hood of his 1972 Toyota Corolla. The engine was silent, a victim of a charging system that had finally given up the ghost. In his grease-stained hand, he held a small, galvanized box—a Genuine New Era AVR-551 , the legendary 12V voltage regulator made in Japan. new era avr-551 12v wiring diagram
The AVR-551 features a standard 6-terminal configuration typically labeled as IG, N, F, E, L, and B. Each terminal serves a specific role in the alternator circuit: The white-with-green wire, the feedback loop from the
Before installation, you can use a multimeter to check for internal shorts between the input and ground pins. In his grease-stained hand, he held a small,
Do not connect the IND terminal directly to 12V without a lamp or resistor—this will destroy the AVR.
Turn the ignition switch to ON (engine off). The charge lamp should illuminate. Measure voltage at the terminal – it should be near battery voltage. Measure at F – it should show near 0V until the alternator spins (normal for some designs).