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.

Lt1 ac wiring

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Old Apr 15, 2012 | 08:39 AM
  #1  
BCdawg57's Avatar
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From: Columbus, OH, USA
Car: '91 Z28, '13 Civic EX-L
Engine: 355 LT1, 1.8 I4
Transmission: T56, 5spd auto
Axle/Gears: 10 bolt 3.42(as long as no breaky)
Lt1 ac wiring

I have an lt1 swap with he corvette a/c setup. I need to know if there is a way to see if I have my setup wired properly. The setup doesn't have any pressure in the system.
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Old Apr 15, 2012 | 10:22 AM
  #2  
cprmn14's Avatar
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From: Dixon, IL
Car: 91 RS
Engine: LTwon
Transmission: T-56
Axle/Gears: Both
Re: Lt1 ac wiring

I stumbled along this. Maybe it will help
https://www.thirdgen.org/forums/ltx-...-c-wiring.html
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Old Apr 25, 2013 | 09:41 AM
  #3  
BCdawg57's Avatar
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Joined: Feb 2005
Posts: 424
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From: Columbus, OH, USA
Car: '91 Z28, '13 Civic EX-L
Engine: 355 LT1, 1.8 I4
Transmission: T56, 5spd auto
Axle/Gears: 10 bolt 3.42(as long as no breaky)
Re: Lt1 ac wiring

Little bit late but thanks that does help a bit. But i want to know is there a way to verify it works. Should i get voltage at the low pressure switch with the ac request on with no charge on the system?
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Old Apr 25, 2013 | 11:09 AM
  #4  
BCdawg57's Avatar
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Joined: Feb 2005
Posts: 424
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From: Columbus, OH, USA
Car: '91 Z28, '13 Civic EX-L
Engine: 355 LT1, 1.8 I4
Transmission: T56, 5spd auto
Axle/Gears: 10 bolt 3.42(as long as no breaky)
Re: Lt1 ac wiring

Well I answered my own question. I went out with an ohm meter and the blue wire on the low pressure switch has continuity with the compressor, and the green wire has continuity with the hvac controls. So as long as everything works properly i should have a working a/c system.

Now, how do i know how much freon to use? Do i go by 1991 specs, or those from a 95 corvette since that is the compressor i will be using?
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