Assertion: alternator's diode | /r/HasProperty | four digits
Facets:
Source sentences:
text: The alternator was usually made weeks to months before the car, and usually had date-coded diodes (four digits, the first three for the day, e.g. 225 for the 225th day of the year, the last one for the year), made before assembly of the alternator though not necessarily before the casting.