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Old 04-02-2018, 12:00 PM   #4
gmachinz
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Join Date: Jun 2011
Location: Des Moines, IA.
Posts: 4,143
Re: Wiring dual radiator fans

If you are using high end relays they should have flyback diode protection soldered in them to begin with. But I suppose adding them can’t hurt too. The diagram on the relays may show a small triangle between the 85/86 spots indicating diode protection if they have them.
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