AC Wiring help....again
08-27-2009, 11:02 PM
#1
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AC Wiring help....again Hi,
I have been reading and researching for weeks here about how to wire up my Vintage Air kit with the PCM controlling the compressor. Everything I have researched show/talks about the trinary switch on the high pressure side. I have not come across how anyone wired up their 2000 LQ4 PCM with the vintage air kit. I assume that I have wasted my money today on the Doc's blocks crimp on -8 switch port and part number 22664328 [3 wire high pressure switch - apearantly only for LS1] from my Chevy dealer today. I have a real hard time understanding schematics with all the bits and pieces drawn between the wires, but I have been studying and studying and reading and reading. I now understand the 2000 LQ4 schematic [attached beolw - sorry, I don't know why AllData is printing the PDF with white text and black background] showing a 2 wire high pressure switch and a 2 wire low pressure cycling switch.
Questions please....
Can anyone tell me exactly how to wire a vitage air kit with a 2000 LQ4 PCM?
Is there anyway to still use the high pressure switch I bought today? If so, how do I wire it?
If I have to get the LQ4 high pressure switch, does anyone know the part number? What do I do about the low pressure cycling switch? Do I just substitute the 2000 LQ4 low pressure switch with the Vintage Air low pressure switch that is in the drier?
I could sure use some help from people who know.
Thanks
Rob
I have been reading and researching for weeks here about how to wire up my Vintage Air kit with the PCM controlling the compressor. Everything I have researched show/talks about the trinary switch on the high pressure side. I have not come across how anyone wired up their 2000 LQ4 PCM with the vintage air kit. I assume that I have wasted my money today on the Doc's blocks crimp on -8 switch port and part number 22664328 [3 wire high pressure switch - apearantly only for LS1] from my Chevy dealer today. I have a real hard time understanding schematics with all the bits and pieces drawn between the wires, but I have been studying and studying and reading and reading. I now understand the 2000 LQ4 schematic [attached beolw - sorry, I don't know why AllData is printing the PDF with white text and black background] showing a 2 wire high pressure switch and a 2 wire low pressure cycling switch.
Questions please....
Can anyone tell me exactly how to wire a vitage air kit with a 2000 LQ4 PCM?
Is there anyway to still use the high pressure switch I bought today? If so, how do I wire it?
If I have to get the LQ4 high pressure switch, does anyone know the part number? What do I do about the low pressure cycling switch? Do I just substitute the 2000 LQ4 low pressure switch with the Vintage Air low pressure switch that is in the drier?
I could sure use some help from people who know.
Thanks
Rob
08-28-2009, 07:54 AM
#2
Try the guys over on:
http://www.trifive.com/forums/forumdisplay.php?f=3
And/or on:
www.chevytalk.com
There are several on those sites, that have done the hookup.
http://www.trifive.com/forums/forumdisplay.php?f=3
And/or on:
www.chevytalk.com
There are several on those sites, that have done the hookup.
08-28-2009, 03:02 PM
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thanks for the input chuck. I am having a hard time finding any lq4/ac info over at those two sites. I will keep trying.
Maybe someone can answer this, in the attached diagram above, when GM draws a switch with the circuit open, does that mean it is a "normally open" switch? Or is there any way to tell how a switch is being used in these diagrams ["normally open" or "normally closed"]?
I am still hoping someone who has used an LQ4 harness with an after market AC system can shed some light.
Rob
Maybe someone can answer this, in the attached diagram above, when GM draws a switch with the circuit open, does that mean it is a "normally open" switch? Or is there any way to tell how a switch is being used in these diagrams ["normally open" or "normally closed"]?
I am still hoping someone who has used an LQ4 harness with an after market AC system can shed some light.
Rob
