* Alternator: Diodes are crucial components in the alternator's rectifier, converting AC current to DC current to charge the battery.
* Voltage regulator: While some older systems might have used simpler regulators, diodes could still be present within the voltage regulator circuit.
* Indicator lights: Diodes are often used in indicator light circuits to prevent current from flowing back through other parts of the electrical system.
* Other circuits: Various other electronic components throughout the vehicle might incorporate diodes.
While you might not find them explicitly labeled "diode," they're integral parts within larger components.