AC Compressor Manual Switch
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Cargo Master
Joined: Jan 2005
Posts: 2,902
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From: Pasadena, Maryland
AC Compressor Manual Switch
I remember years ago there was a thread on wiring in a separate switch for manual control of the AC compressor. I dont really want to run wires to the engine compartment and rather handle it under the dash. I did a search but came up empty handed. Anybody remember?
TIA
Duncan
TIA
Duncan
More Turbo
Joined: May 2016
Posts: 717
Likes: 9
The Clutch is activated by System Voltage (12vdc). Only two poles (+) & (-). Any switch supplying 12vdc to the (+) side will activate the Clutch. Couple wires and a Switch with a Fuse will do the Trick.
Never used one to control the system except when I had a 85 Celebrity and a 76 LTD which had wiring issues. Did the same for an Electric Cooling Fan on a 88 Celebrity Wagon
Never used one to control the system except when I had a 85 Celebrity and a 76 LTD which had wiring issues. Did the same for an Electric Cooling Fan on a 88 Celebrity Wagon
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Cargo Master
Joined: Jan 2005
Posts: 2,902
Likes: 2
From: Pasadena, Maryland
The compressor clutch is powered in the max ac, ac, panel/floor, defrost floor, defrost positions.
To me its just a needless drag on the engine which in all reality is not a huge deal but I like flipping switches!
To me its just a needless drag on the engine which in all reality is not a huge deal but I like flipping switches!
More Turbo
Joined: May 2016
Posts: 717
Likes: 9
In the case described, I would pit an in-line switch in the current circuit. This way you can turn it off (open the circuit) or in the On (closed circuit) the pressure switch will control it as designed in the Summer months.
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Cargo Master
Joined: Aug 2009
Posts: 2,137
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From: Glendive, MT
You need to find out what wire on the heater control feeds the compressor clutch and install you switch in that wire. That will keep the pressure switches functional. Those pressure switches keep the compressor from coming on when the outside temp is too cold or from over pressure, both of those conditions can destroy the system.
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Postmaster
Joined: Nov 2015
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From: Colorado Springs
Here's why I gave you my life's story above.
Keeping in mind what Pirschwagon stated and my experience with the low pressure switch, it may be easiest to just Tap in to that pigtail with a switch that will open or close that circuit and allow you to override the AC system altogether. Not sure if I'm in the right tracker on track just my two cents ...
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