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Re: Dual Fans - Vintage Air - ProFlo-4 ECU
That is NOT a wire setup that can be used for a ECU trigger fan relay. If you swap the temp switch for a ecu you risk a back feed because you have a path to direct ground at pin 86 via the trinary switch. Strongly suggest you understand relays and isolation requirements of your ecu. Do not blend old style wiring with modern ecu electronic switches. Very different animals and they react and behave very differently. The fan relay trigger can not share multipal grounding paths.
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02-12-2026, 04:24 PM
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