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Old 09-10-2019, 09:18 AM   #1 (permalink)
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Question 2003 Aerio A/C compressor question

Can anyone tell me where the fuse or the relay for the A/C compressor clutch is? I know where the two fuse/relay boxes are behind the battery, I just don't know which fuse/relay to pull to stop the compressor clutch from engaging.

My A/C has been in disuse for so long that it makes very loud noises and makes the whole car vibrate when it engages, and I would like to just disable it. This wouldn't normally be an issue in most circumstances, but because it engages automatically when I set the interior air to defrost my windshield, it makes driving during the wet and cold seasons a bit of a pain.

...Also, repairing/replacing the A/C compressor is kind of out of the question as I cannot afford to do so.
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Old 09-10-2019, 10:35 AM   #2 (permalink)
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disconnect the plug at the compressor, if you cannot find the fuses..
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Old 09-11-2019, 12:47 AM   #3 (permalink)
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Yeah. I just don't have any way to lift the darn car up so I can get under there and do that at the moment.
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Old 09-11-2019, 01:01 AM   #4 (permalink)
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Quote:
Originally Posted by piccolo113 View Post
Yeah. I just don't have any way to lift the darn car up so I can get under there and do that at the moment.
you don't have a jack in the car to change a tyre? use that and a couple of bits of wood to block it in case it slips off the jack

and the fuse box cover is labelled with fuse descriptions
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Old 09-11-2019, 06:09 AM   #5 (permalink)
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Quote:
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and the fuse box cover is labelled with fuse descriptions
Said fuse descriptions are "relay 1" "relay 2" etc. They do not actually say which piece corresponds to which part of the car.

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you don't have a jack in the car to change a tyre? use that and a couple of bits of wood to block it in case it slips off the jack
Yeah, my tire jack is in the trunk....but that little thing isn't meant to be safe enough to crawl under a car with. Add a touch of claustrophobia to the mix, and the thought of that being the only thing holding up the car with me under it is terrifying beyond belief. :/

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Old 09-11-2019, 12:10 PM   #6 (permalink)
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if it looks like the one in this pic, relays are at the end as shown.

relay labelled as "1" in the pic is the compressor relay, Diagrams from a 2003.
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2003 Aerio A/C compressor question-2003aeriofuseboxdiagram.jpg.jpg  
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Last edited by 2013GV; 09-11-2019 at 12:12 PM.
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Old 09-11-2019, 09:30 PM   #7 (permalink)
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Well, the diagram you gave me doesn't correspond to my vehicle, but I went and tried anyway. I pulled every fuse and every relay in both relay/fuse boxes one by one and started up the car to test the defrost setting for the fan and the AC button. Nothing disabled it. Though there is a big 80A fuse I couldn't pull out (I figured if it's that difficult to pull out, I probably shouldn't try any harder).

I also took a look under the car and can't see anything without it being lifted up. The A/C compressor is behind the tire, as far as I can tell, and of course there's that lining that covers the bottom and wheel-well side of the engine compartment. I think there's just straight up nothing I can do to disable the darn thing with what I have.
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Old 09-11-2019, 09:34 PM   #8 (permalink)
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there should be an a/c button on the heater control panel, does that not work?

and one of the relays under the bonnet will control the compressor. the big 80a fuse is the main one for the car and is bolted in.
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"Dogs feel very strongly that they should always go with you in the car, in case the need should arise for them to bark violently at nothing right in your ear."
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Old 09-11-2019, 10:11 PM   #9 (permalink)
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Quote:
Originally Posted by 2013GV View Post
there should be an a/c button on the heater control panel, does that not work?
I....what? What did I say that made you think that? No, the button works just fine. My issue this entire time has been wanting to make it so the AC compressor can get no power as it is clearly damaged.

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and one of the relays under the bonnet will control the compressor.
Like I said, I pulled every single one out, one by one, and started up the car and tested each time. The compressor engaged every single time. None of the relays or fuses being pulled stopped it from engaging. I'm telling you this as a *fact* because I just did this a few hours ago.

I'm sorry, I know you're just trying to help. I'm super frustrated with the situation and how even simple trial-and-error testing hasn't resulted in anything useful.
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Old 09-11-2019, 11:46 PM   #10 (permalink)
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Quote:
Originally Posted by piccolo113 View Post
I....what? What did I say that made you think that? No, the button works just fine. My issue this entire time has been wanting to make it so the AC compressor can get no power as it is clearly damaged.


Like I said, I pulled every single one out, one by one, and started up the car and tested each time. The compressor engaged every single time. None of the relays or fuses being pulled stopped it from engaging. I'm telling you this as a *fact* because I just did this a few hours ago.

I'm sorry, I know you're just trying to help. I'm super frustrated with the situation and how even simple trial-and-error testing hasn't resulted in anything useful.
if you press the a/c button on the heater control panel so it is not illuminated, that disables the A/C compressor from activating when you select defrost, or turn the fan on in the car
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2015 5 dr Grand Vitara 2.4 (daily driver)
2008 Swift M15A
1971 V8 HG Holden with 383 stroker 9" torq lok and TH350 trans (the toy)
Mitzi RVR 2.0 (not one of my better buys)
the 2013 3 dr GV is now the off road only toy

"Dogs feel very strongly that they should always go with you in the car, in case the need should arise for them to bark violently at nothing right in your ear."
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