LTX and LSX Putting LT1s, LS1s, and their variants into Third Gens is becoming more popular. This board is for those who are doing and have done the swaps so they can discuss all of their technical aspects including repairs, swap info, and performance upgrades.

AC Wiring Assistance - 91 Camaro LS Swap/3rd gen HVAC

Thread Tools
 
Search this Thread
 
Old Mar 2, 2018 | 08:09 AM
  #1  
TKO500's Avatar
Thread Starter
Senior Member
iTrader: (5)
 
Joined: Oct 2004
Posts: 608
Likes: 0
From: Pelham, NH
Car: 91 B4C, 17 C7 GS, 16 Denali DMax
Engine: LS3, LS3, LML
Axle/Gears: 3.23, 3.42, 3.23
AC Wiring Assistance - 91 Camaro LS Swap/3rd gen HVAC

After searching a number of threads and did not find guidance around my specific configuration, although I am sure it exists. Feel free to point me in the right direction or post up the specifics.

I have a LS in my 91 Camaro and preserved all of the the factory HVAC components (wiring, relay, compressor, etc). My goal is to integrate this into the existing LS configuration.

Current components are:

            Looking for guidance on how exactly to functionally wire the HVAC.
            Attached Thumbnails AC Wiring Assistance - 91 Camaro LS Swap/3rd gen HVAC-img_3392.jpg   AC Wiring Assistance - 91 Camaro LS Swap/3rd gen HVAC-img_3393.jpg  

            Last edited by TKO500; Mar 2, 2018 at 08:19 AM.
            Reply
            Old Mar 2, 2018 | 11:59 AM
              #2  
            6speedIROC's Avatar
            Senior Member
            20 Year Member
            iTrader: (3)
             
            Joined: Jun 2002
            Posts: 722
            Likes: 6
            From: Ottawa, Ontario
            Car: 86 IROC
            Engine: LQ4 6.0L
            Transmission: T56
            Axle/Gears: 3.55 8.8
            Re: AC Wiring Assistance - 91 Camaro LS Swap/3rd gen HVAC

            Check out my wiring diagram for how mine is set up..

            https://www.thirdgen.org/forums/ltx-...-pcm-into.html
            Reply
            Old Mar 3, 2018 | 11:43 AM
              #3  
            kenney001's Avatar
            Member
            iTrader: (1)
             
            Joined: Nov 2008
            Posts: 120
            Likes: 2
            From: TX
            Car: 1990 Iroc-Z
            Engine: 5.7 TPI
            Transmission: 700r4
            Axle/Gears: 3.23
            Re: AC Wiring Assistance - 91 Camaro LS Swap/3rd gen HVAC

            I have exactly the same setup. I bought another oval relay and put it on the extra relay mount next to the blower motor. Wire it like this:

            Note the purple doesnt HAVE to go to IAT. It's either a ground or 5v reference I cannot remember, nothing specific to the IAT

            I also ditched the low pressure switch on the dryer


            Last edited by kenney001; Mar 3, 2018 at 11:46 AM.
            Reply
            Old Mar 9, 2018 | 11:15 PM
              #4  
            TKO500's Avatar
            Thread Starter
            Senior Member
            iTrader: (5)
             
            Joined: Oct 2004
            Posts: 608
            Likes: 0
            From: Pelham, NH
            Car: 91 B4C, 17 C7 GS, 16 Denali DMax
            Engine: LS3, LS3, LML
            Axle/Gears: 3.23, 3.42, 3.23
            Re: AC Wiring Assistance - 91 Camaro LS Swap/3rd gen HVAC

            The diagram shows integrating the wiring with the PCM. I would prefer allow it to function as a standalone system and integrate the AC request wire only.

            Is this a possibility?
            Or am I forced to wire it as noted in the above diagram?
            Reply
            Old Mar 10, 2018 | 12:33 AM
              #5  
            88Greg's Avatar
            Member
            10 Year Member
             
            Joined: Jul 2015
            Posts: 132
            Likes: 7
            From: Vancouver, Canada
            Car: 88 Trans am
            Transmission: T56
            Axle/Gears: C4 IRS 3.42
            Re: AC Wiring Assistance - 91 Camaro LS Swap/3rd gen HVAC

            Depends if you want the PCM to bump the idle _and_ turn rad fans on.
            Reply
            Old Jan 29, 2020 | 06:37 PM
              #6  
            eduardosac's Avatar
            Junior Member
             
            Joined: Jun 2014
            Posts: 19
            Likes: 0
            From: Sacramento, CA
            Car: 1990 Iroc-z
            Engine: LS3/LSA blower
            Transmission: T56
            Axle/Gears: 3.27
            Re: AC Wiring Assistance - 91 Camaro LS Swap/3rd gen HVAC

            Originally Posted by TKO500
            After searching a number of threads and did not find guidance around my specific configuration, although I am sure it exists. Feel free to point me in the right direction or post up the specifics.

            I have a LS in my 91 Camaro and preserved all of the the factory HVAC components (wiring, relay, compressor, etc). My goal is to integrate this into the existing LS configuration.

            Current components are:
            Looking for guidance on how exactly to functionally wire the HVAC.
            any luck on figuring out how to make the compressor work off of single wire
            Reply
            Old Jan 29, 2020 | 07:32 PM
              #7  
            scooter's Avatar
            Supreme Member
            25 Year Member
            Liked
            Loved
            Community Favorite
            iTrader: (11)
             
            Joined: Sep 1999
            Posts: 4,354
            Likes: 308
            From: NJ
            Car: 92 Firebird
            Engine: 4.8 LR4
            Transmission: T56
            Axle/Gears: 3.45 9 Bolt
            Re: AC Wiring Assistance - 91 Camaro LS Swap/3rd gen HVAC

            Originally Posted by eduardosac
            any luck on figuring out how to make the compressor work off of single wire
            Just leave it wired like the stock TPI if you want, then have the clutch command wire connected to the LS ECM so it knows the air is on
            Reply
            Related Topics
            Thread
            Thread Starter
            Forum
            Replies
            Last Post
            Damien00677
            Mid-West Region
            1
            Feb 20, 2012 11:16 AM
            multi-tasking
            Body
            5
            Mar 28, 2011 07:38 PM
            Demo77
            Interior
            6
            Jul 30, 2010 10:46 AM
            maroman88
            Interior Parts for Sale
            3
            Oct 6, 2008 12:44 AM
            FlamedROC
            Body
            5
            Dec 26, 2004 01:38 PM




            All times are GMT -5. The time now is 02:19 PM.