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The PCM turns the A/C on by grounding the A/C compressor clutch relay when commanded by the A/C heater control switch and the A/C low and high pressure switches are closed and grounded.
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To get the benefit of the hi and lo pressure switches tap into the light green/white wire behind the AC heater control. The wire coming from C134 would be #2 on the 3 way switch. Ground wire would
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I've been meaning to post about this as well. If I am correct (and very well could not be) the PCM controls the AC compressor. I have thought about installing a switch that will interrupt the power
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Welcome To Mopar1973Man.Com LLC
We are privately owned, with access to a professional Diesel Mechanic, who can provide additional support for Dodge Ram Cummins Diesel vehicles. Many detailed information is FREE and available to read. However, in order to interact directly with our Diesel Mechanic, Michael, by phone, via zoom, or as the web-based option, Subscription Plans are offered that will enable these and other features. Go to the Subscription Page and Select a desired plan. At any time you wish to cancel the Subscription, click Subscription Page, select the 'Cancel' button, and it will be canceled. For your convenience, all subscriptions are on auto-renewal.
Where I'm heading with this is my 2000 Accord has a button to turn ac on and off also it has a button for fresh and recycled air, which is very nice. I have full control over it. So I'm wondering if anyone put a button or a switch at least for ac, so when you have it on defrost in winter then ac compressor doesn't run and not only that heat is not the greatest like we all know it just would make sense to not have ac on. No I know when there is moisture ac helps defrost in that case you can always turn it on but for the most part I'd be leaving it off.
And not sure on recycled/fresh air door if it could be put on a switch. I don't see why not for ether just haven't looked that hard in to it.
Some day it will be like in a plane with all the switches and guages.