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#14
05-01-2013, 06:52 PM
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OK, updates on my AC repair.
Took the truck to my friend and he pulled down 25hg of vacuum and the system held it no problem so I guess the schraders are fine. However, he noticed right away that the system was not doing anything. He dumped some R134a into the truck under vacuum but still nothing. I guess I have a classic X5 problem going on now. The auxiliary fan does not switch on at all. From what I have read there is some debate over this. Some say their AC systems work without the aux fan while others say the DME will not run the AC system if it does not detect the fan running. I would like to test the aux fan to see if that truly is the problem but have not read a post yet that details how to bypass the DME and run the fan. Have also read that 12v supplied to the lead of the AC compressor should allow me to hear the clutch engage and disengage. I guess I can start there but want to verify that it is ok to do that. Would not want to do anything that would risk damaging the computer. Anyone have a method for testing the aux fan? Cheers Bernie 
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#16
05-01-2013, 08:08 PM
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Very cool,
Yes, that was why I wasn't attempting to send any voltage to it. I wanted to know if there was a correct way to test it as I knew it had its own onboard PCB. I believe I can send 12v to the compressor though from what I have read. That would rule out one item. Thanx! Bernie
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#17
05-01-2013, 08:28 PM
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Razorboy,
I remember when it was much, much harder to get technical advice and gearheads still figured out how to get the job done--even air conditioning. We may have stayed up all night but pretty much anything we could take apart we could fix. I think is is great you are tackling something you have less experience doing. Would like to hear what you have to do to solve the problem.
__________________
 X5 4.6 2002 Black Sap, Black interior. 2013 X5M Melbourne Red, Bamboo interiorDallas
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#18
05-01-2013, 08:39 PM
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Quote:
I am not a dick I promise, far from it. Spent many years on Rennlist helping other Porsche 928 owners to fix the things that I had already fixed. I genuinely enjoy giving back to the community. Put it this way, I know a 1000 times more about the AC system in the X5 now than I did a few days ago. That's the exchange we all hope for when we visit these forums and I believe that's why most of us come here. I have a friend, actually my wife's boss, who has a BMW and has suggested a local shop that will diagnose the fan for me if need be. He said he is a good guy who won't overcharge. Did a fan replacement on his 323 and only charged him 60.00 in labor so that sounds fair for that car. For me, all I want is the diagnosis and I will get the parts and repair it myself. Thanks Again!
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#19
05-01-2013, 08:48 PM
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I have paid for many tech diagnosis rather than just start throwing parts at it. There are some things I don't do but it's because I don't want to, that is very seldom. Thanks for being a part of the forum. We have something in common, I used to help other 930 owners diy
__________________
X5 4.6 2002 Black Sap, Black interior. 2013 X5M Melbourne Red, Bamboo interiorDallas
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#20
05-01-2013, 08:54 PM
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Quote:
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