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Old 02-15-2012, 07:18 PM   #1
keanevann
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Vintage Air Trinary Switch w/ Flex-a-Lite Black Magic Fan wiring

Hi guys i'm wiring this vintage air trinary safety switch on my 70 LS1 swap.... I just need to make sure I am going at this right before i make any permanent connections.....First pic is of Vinatge Air's trinary wiring schematic... Second one is my own picture of what I think it should be wired like with my black magic fan....and finally the last one is for the Flex-a-Lite Black Magic Fan that already has a relax box attached to it....So since the radiator fan has a built in temp switch and relay, the wiring in my own drawing should work, correct? Thanks
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Old 02-15-2012, 07:24 PM   #2
68 short step
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Re: Vintage Air Trinary Switch w/ Flex-a-Lite Black Magic Fan wiring

no, on your drawing you have "key on power" coming from your tri sw.... it needs to go to terminal M of the fans control box.....
the blu or red wire from the tri sw. needs to go to ground


that make sence?

Last edited by 68 short step; 02-15-2012 at 07:31 PM.
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Old 02-15-2012, 07:40 PM   #3
68 short step
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Re: Vintage Air Trinary Switch w/ Flex-a-Lite Black Magic Fan wiring

looking at it again, thats only if the M terminal operates when grounded... other then that you may need to add a relay.... wiring it up the way you want you would either blow the sw, or the wiring. cause you're trying to pass all the amps of the fan through the sw.
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Old 02-16-2012, 01:54 AM   #4
keanevann
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Re: Vintage Air Trinary Switch w/ Flex-a-Lite Black Magic Fan wiring

The amps from the fan wont be going through the trinary switch. The fan has a + that goes to the battery. The "C" Terminal just needs a + signal to activate the internal fan relay. At least that's how i see it.... "C" and "M" are essentially the same thing + 12v triggers.
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Old 02-16-2012, 02:01 AM   #5
keanevann
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Re: Vintage Air Trinary Switch w/ Flex-a-Lite Black Magic Fan wiring

Just checked it.... It takes 12.6 Amps to run the fan (Yes I measured Amps not Volts ) ..... It takes .11 Amps to give signal to terminal "C"..... The fan has an internal A/C relay that requires a positive input. I could run a relay and use the ground to trigger it but I don't believe I need to run a relay for .11 Amps. Is it ok to let .11 Amps go through the trinary switch? Again thank you guys for the help....
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Old 02-16-2012, 09:03 AM   #6
Andy4639
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Wink Re: Vintage Air Trinary Switch w/ Flex-a-Lite Black Magic Fan wiring

If the fans have built in relays then all you need is a 12 v source and a ground. The switch will handle the amps it takes to complete the circuit.
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