Yeah you "should" be able to just reverse the polarity, I'm really surprised that fan is so hard to acquire, before doing the re-wire I would call a junkyard and ask about the parts interchangability for that fan. I can almost GUARANTEE that exact fan setup was used on other older Infiniti models, maybe the G20

 

Nevermind, ok I found out why I haven't been able to find the correct fan, I was looking under COOLING SYSTEMS, but I should have been looking under HVAC systems, I'm pretty sure this is the fan you need.

https://www.infinitipartsonline.com/...enser-fan-scat

 

I'll do that. Thanks again Cleric.