79 AC wiring questions
Thread Starter
Burning Brakes
Joined: May 2014
Posts: 884
Likes: 128
From: Rhine Georgia
79 AC wiring questions
Blower side works fine. I'm tring to get a basic concept for my compressor wiring.
I'm not running a idle solenoid. I have a wire thats hot when I turn on ac.
Is it as simple as running this wire through the low pressure switch and on to my grounded R4 Compressor?
Does a 79 have a high pressure switch? (I found the low but don't see a high)
I'm not running a idle solenoid. I have a wire thats hot when I turn on ac.
Is it as simple as running this wire through the low pressure switch and on to my grounded R4 Compressor?
Does a 79 have a high pressure switch? (I found the low but don't see a high)
Safety Car
Joined: Oct 2007
Posts: 4,383
Likes: 1,755
From: Seattle Area Washington
There should be thermostatic switch on the line of your evaporator that opens if evaporator core temperature falls below 33*. Wiring passes through the N/C low pressure cutout switch, then the N/C thermo switch, and then to the compressor clutch. Might be different wire colors from my 77, Lt. green in lpco switch out Lt. blue in to thermo switch out dk. green to clutch.
Safety Car
Joined: Oct 2007
Posts: 4,383
Likes: 1,755
From: Seattle Area Washington
If you bypass the switch your evaporator will ice up and have no airflow through it. Along with that, there is a good possibility of splitting the evaporator fiberglass housing if the block of ice gets to big.
Thread Starter
Burning Brakes
Joined: May 2014
Posts: 884
Likes: 128
From: Rhine Georgia
Anyone have a pict of a Thermostatic Switch mounted?
I'm guessing it can mount against the evaporator fiberglass housing with the sensor line wrapped around the High Pressure line coming from bottom of the housing?
I'm guessing it can mount against the evaporator fiberglass housing with the sensor line wrapped around the High Pressure line coming from bottom of the housing?
Last edited by Bloodzone; Aug 7, 2018 at 01:00 PM.
Safety Car
Joined: Oct 2007
Posts: 4,383
Likes: 1,755
From: Seattle Area Washington
Unfortunately I can't get a good picture of the switch mounting bracket, it's tight in there.
You can see a example of what the bracket should look like.
https://www.paragoncorvette.com/down...ts-catalog.pdf
Let manual download, you don't have to save it.
Middle of page 83
.
You can see a example of what the bracket should look like.
https://www.paragoncorvette.com/down...ts-catalog.pdf
Let manual download, you don't have to save it.
Middle of page 83
.
Last edited by bmotojoe; Aug 8, 2018 at 12:09 PM.
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