I set up an A/C kill switch in my '99, as well an ABS kill switch using this method-Originally Posted by Techy-D
Has anyone found a way to turn off the Air conditioner, like this, in the (old)99 models?
http://www.wtv-zone.com/markg/switch.html
I've been using these switches for almost four years and I use the A/C kill switch almost every day in the winter. Selective use of the A/C saves wear 'n tear on the A/C system and also wear on the engine, saving gas and money. I have saved countless hours of A/C use with this switch. There are several other ways of doing this, such as simply cutting the wire that comes from the contact point when the lever goes to a defrost mode. You can still operate the A/C in defrost manually with the button that way.
The two reasons Ldub gave for vehicles to have auto-A/C in defrost are good ones. However, we're all smart enough to know when we need A/C defrost due to inside fogging and when we don't. If I see fogging I run the compressor just long enough till the fog is gone. If my A/C hasn't run in about two weeks, I turn it on for a short time to keep everything lubed and working right. Without any fogging, there is absolutely no reason to have the A/C compressor running all the time in the defrost mode.
My A/C compressor runs only when I want it to, not one second more. Kill switches for A/C, ABS, airbags, TOD and other systems put us in control instead of these things coming on automatically when we don't want them. And that's a good thing.
Mark
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