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a/c wiring info needed...

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Old Sep 29, 2009 | 10:11 PM
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Default a/c wiring info needed...

doing some playing around with ac wiring and heres what ive got. I am using blu 42 as the ground switch for a single fan and single relay and the fan operates normally. When i setup the VA i want the fans to turn on with it. After doing some testing, i put 12+ to (red 18) and the fan relay switched on as did the fan. when i removed it the fan turned off. So if i tie into one of the va 12+ wires when the sytem is turned on would this be the correct setup? if so then i just need to find out which pin is used to up the idle? anyone know which one?
thanks for any help
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Old Sep 30, 2009 | 01:48 AM
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Originally Posted by lsxfirstgen
doing some playing around with ac wiring and heres what ive got. I am using blu 42 as the ground switch for a single fan and single relay and the fan operates normally. When i setup the VA i want the fans to turn on with it. After doing some testing, i put 12+ to (red 18) and the fan relay switched on as did the fan. when i removed it the fan turned off. So if i tie into one of the va 12+ wires when the sytem is turned on would this be the correct setup? if so then i just need to find out which pin is used to up the idle? anyone know which one?
thanks for any help
try this, I haven't verified it yet, but some members have looked at it and says all looks good. This should allow everything to function as needed.

Last edited by ssduane; Jan 1, 2010 at 10:51 AM.
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Old Sep 30, 2009 | 01:24 PM
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how about the pin thats used for the idle up, does anyone know what # it is? or is it tied in with the rest of system.
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Old Sep 30, 2009 | 02:35 PM
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Originally Posted by lsxfirstgen
how about the pin thats used for the idle up, does anyone know what # it is? or is it tied in with the rest of system.
I guess it would be red 18. clutch relay signal telling the PCM the A/C is on. might also need the input from the pressure switch telling the PCM the A/C system has adequete pressure.

Last edited by ssduane; Sep 30, 2009 at 02:42 PM.
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Old Sep 30, 2009 | 03:51 PM
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i might just have to wait and get it all installed and see how it goes. i didnt have any idle change when i powered red 18 but it many need more readings.
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