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Unread 02-04-2007, 10:24 AM   #1
stedwest
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AC compressor disconnect

I started a thread yesterday, about switches to replace my knock-outs... Thanks to all.

What I have in mind, was to put a switch in-line with my AC relay, allowing the defroster to run without the compressor engaged... anybody done this?

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Unread 02-04-2007, 10:26 AM   #2
RnEmOvr
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dont see why it wouldnt work, not like it is needed, unless they changed the entire system for units w/and units w/o a/c
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Unread 02-04-2007, 10:35 AM   #3
stedwest
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This ain't Atlanta, so humidity is rarely a problem... besides, they're were about a billion vehicles built with defrosters, before they invented A/C.

I thought I'd try interupting the ground, off the relay, to disconnect the compressor.
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Unread 02-04-2007, 10:36 AM   #4
RnEmOvr
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Quote:
Originally Posted by stedwest
This ain't Atlanta, so humidity is rarely a problem... besides, they're were about a billion vehicles built with defrosters, before they invented A/C.

I thought I'd try interupting the ground, off the relay, to disconnect the compressor.
something try as a "easy check" is just ppll the plug on back of compressor, then turn defrost on and see what happens, my 99 doesnt have a/c but still has defrost
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Unread 02-04-2007, 12:13 PM   #5
stedwest
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Quote:
Originally Posted by dzntzhellfire
something try as a "easy check" is just ppll the plug on back of compressor, then turn defrost on and see what happens, my 99 doesnt have a/c but still has defrost

Pulling the plug off the compressor would do it, but I want a 'low amp' solution.. there-fore I need to interupt the relay circuit.
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Unread 02-04-2007, 01:01 PM   #6
BlueFlame
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Pull out the HVAC control panel.
On the back of the selector switch is a (I believe) 2 wire connector. All you need to do is cut one of the wires and bring the ends to a switch. You can then choose switch ON - normal operation, switch OFF, no AC. What you are doing is preventing the PCM from seeing an input calling for AC. A small round push-on/push-off switch cleverly located in the control panel could even look stock. Careful to make sure it doesn't damage any circuit when you drill the hole.
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Unread 02-04-2007, 04:41 PM   #7
timc
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Yes -- my TJ has aftermarket AC and it runs when in certain positions on the selector dial. I put the switch in mine because I do like to run standard vent air when sitting in traffic with the top down and doors off. In this situation, AC seemed pretty dumb. Still kinda curious if a different AC control panel (from a '99 or '00 jeepw/stock AC?) would connect OK in my vehicle.
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