The difference is:
Placing your VVEL relay in the fan relay slot may well be adequate for the fan which works very infrequently. Relay points don't get hot or sizzle.
Thus you will prove nothing (other than it's OK-ish for occasional use)
The VVEL Relay contacts get hot, arc. or sizzle. VVEL can go on/off frequently.
Using the known good PWM relay (which is right next to the VVEL relay)....to prove the VVEL is OK/or not... is a valid test procedure if you have no new relay, takes a minute........ is cheap, simple, and often satisfying.
The OE VVEL relay is/was a standard item, maybe at its top designed limit but "just adequate". 10 years ago I posted "alternative" part numbers...long forgot....no better but cheaper and readily available without recourse to
Nissan stock.
Fritz
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