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 Post subject: Mini air con
PostPosted: Sun Oct 09, 2016 7:11 pm 
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848cc
848cc

Joined: Sun Oct 02, 2016 7:19 pm
Posts: 33
Hey, I'm trying to trace back why the mini doesn't have any 12v power hitting the compressor. I've traced it from the compressor back to a harness plug on the passenger side bulk head, now I have the dash apart.
Any suggestions on why she's not getting power?
The switches on the dash work perfectly


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 Post subject: Re: Mini air con
PostPosted: Sun Oct 09, 2016 7:16 pm 
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1275cc
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Joined: Fri May 02, 2008 3:07 pm
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There is a low pressure switch that will prevent the clutch engaging if low or no gas.


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 Post subject: Re: Mini air con
PostPosted: Sun Oct 09, 2016 7:32 pm 
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848cc
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Had it regassed this morning. Turns out my A6 aircon fuse in the cabin keeps blowing 10amp. I chucked a 30amp in there to test and it blew immediately too..

Looks like a short circuit...where the heck is that going to be?


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 Post subject: Re: Mini air con
PostPosted: Sun Oct 09, 2016 7:37 pm 
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1275cc
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Remove all plugs from the aircon components and start reconnecting one at a time.


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 Post subject: Re: Mini air con
PostPosted: Sun Oct 09, 2016 7:39 pm 
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1275cc
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Compressor clutches and condensor fans short out often.


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 Post subject: Re: Mini air con
PostPosted: Sun Oct 09, 2016 7:47 pm 
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848cc
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Should I start at the dash and work through the plugs to the compressor?


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 Post subject: Re: Mini air con
PostPosted: Sun Oct 09, 2016 8:02 pm 
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1275cc
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The bulkhead plug will tell you if it is inside the cab or under the bonnet. If under the bonnet then i would pull the compressor clutch and consensor fan and then see if it blows.


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 Post subject: Re: Mini air con
PostPosted: Sun Oct 09, 2016 8:25 pm 
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848cc
848cc

Joined: Sun Oct 02, 2016 7:19 pm
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Thanks gtogreen
I've unplugged the bulkhead harness plug and it's still blowing. I've unplugged the switch panel plug to the temp/blower and it blows...arghhhhhh! Could it be a dodgy relay?


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 Post subject: Re: Mini air con
PostPosted: Sun Oct 09, 2016 8:44 pm 
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1275cc
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If there is a similar relay then swap it over to test it

Keep plugging away at it ( or in your case - unplugging away)


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 Post subject: Re: Mini air con
PostPosted: Sun Oct 09, 2016 9:17 pm 
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1360cc
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The AC relay unit looks like the ECU relay unit, however it's not the same despite its looks.
Swapping it with the ECU one may risk damage to lots of things if it is indeed the problem.


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 Post subject: Re: Mini air con
PostPosted: Sun Oct 09, 2016 9:40 pm 
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848cc
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Joined: Sun Oct 02, 2016 7:19 pm
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Yea, I did see it under the dash and the one on the engine..I won't be swapping those over! Thanks for the heads up.
I've managed to find a wiring diagram for the ac. I've pulled every plug in relation to the fuse box, I'm now going to try and rewire the ignition side to the fuse box....what a night this has turned into!


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 Post subject: Re: Mini air con
PostPosted: Sun Oct 09, 2016 9:41 pm 
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848cc
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Here's the diagram


You do not have the required permissions to view the files attached to this post.


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 Post subject: Re: Mini air con
PostPosted: Sun Oct 09, 2016 9:42 pm 
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848cc
848cc

Joined: Sun Oct 02, 2016 7:19 pm
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I've pulled the plugs to the thermostat, relay module and switch pack and it still blows


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 Post subject: Re: Mini air con
PostPosted: Sun Oct 09, 2016 9:54 pm 
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848cc
848cc

Joined: Sun Oct 02, 2016 7:19 pm
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Okay, all 3 are unplugged 100%. I have wired directly from ignition terminal (white) to fuse box white and pop goes the fuse.
I am completely out of ideas now


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 Post subject: Re: Mini air con
PostPosted: Sun Oct 09, 2016 10:07 pm 
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1360cc
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Location: SE Melbourne
Ckeck if one side of the fuse is earthed?


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