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  1. #1
    Join Date
    Sep 2017
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    59

    LS3 & Vintage Air Wiring

    I'm hoping this is as simple as I think but then again I'm no electrician so here I am asking for help once again. We all know an LS3 comes with a black box that powers the LS3, it connects to the wiring harness and it has two wires coming from it, one for the fuel pump the other for the rad fan. I've also attached the vintage air wiring diagram when using a trinary switch. My understanding of this switch is when the rad fan is off(no engine coiling required), the switch will power up the rad fan when the AC system requires it. Do I just connect the blue wire (rad fan) from the LS3 power center to the 40A circuit breaker??



    Thanks in advance,
    Perry
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  2. #2
    Join Date
    Jul 2006
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    The Blue wire will go to your fan relay trigger. Some fan controllers have an AC trigger wire. If yours does not, you will splice it into the wire that triggers your fan relay via coolant temp. That will turn the fan(s) on by either the trinary or coolant temp

  3. #3
    Join Date
    Feb 2011
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    Just buy the PCM dual fan kit and AC bump and call it a day

  4. #4
    Join Date
    Nov 2006
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    Mountain Springs, Texas
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    Quote Originally Posted by icemanrd19 View Post
    Just buy the PCM dual fan kit and AC bump and call it a day
    X2. Those fans running full speed all the time will get old real fast...

    http://www.pcmofnc.com/product-categ...ing-system-19/

    Don
    1969 Camaro - LSA 6L90E AME sub/IRS
    1957 Buick Caballero - huge project
    1959 El Camino - Ironworks frame
    1969 Mustang Sportsroof
    1956 Cameo - full C5 suspension/drivetrain

  5. #5
    Join Date
    Sep 2017
    Posts
    59
    Thanks for the awesome responses. I do like the idea dual fan controller and AC bump. Just want to be sure I order the right parts. Don posted a link, the photo is where the link took me, which part do I order and I'm sure they provide wiring diagrams.?

    Perry
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  6. #6
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    Nov 2006
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    The first two items are what you want.

    Don
    1969 Camaro - LSA 6L90E AME sub/IRS
    1957 Buick Caballero - huge project
    1959 El Camino - Ironworks frame
    1969 Mustang Sportsroof
    1956 Cameo - full C5 suspension/drivetrain

  7. #7
    Join Date
    Feb 2011
    Location
    dallas, tx
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    And make sure you read up on it on here. bottom line dont crimp anything till you install both parts. The AC bump uses the same two wires as the fan kit that you cut. No need to install it at the ECU connector whenever you have access to them right at the fuse box. It will make sense when you get it.