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Mini air con
https://ausmini.com/forums/viewtopic.php?f=2&t=93956
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Author:  decsmith [ Sun Oct 09, 2016 7:11 pm ]
Post subject:  Mini air con

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

Author:  gtogreen1969 [ Sun Oct 09, 2016 7:16 pm ]
Post subject:  Re: Mini air con

There is a low pressure switch that will prevent the clutch engaging if low or no gas.

Author:  decsmith [ Sun Oct 09, 2016 7:32 pm ]
Post subject:  Re: Mini air con

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?

Author:  gtogreen1969 [ Sun Oct 09, 2016 7:37 pm ]
Post subject:  Re: Mini air con

Remove all plugs from the aircon components and start reconnecting one at a time.

Author:  gtogreen1969 [ Sun Oct 09, 2016 7:39 pm ]
Post subject:  Re: Mini air con

Compressor clutches and condensor fans short out often.

Author:  decsmith [ Sun Oct 09, 2016 7:47 pm ]
Post subject:  Re: Mini air con

Should I start at the dash and work through the plugs to the compressor?

Author:  gtogreen1969 [ Sun Oct 09, 2016 8:02 pm ]
Post subject:  Re: Mini air con

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.

Author:  decsmith [ Sun Oct 09, 2016 8:25 pm ]
Post subject:  Re: Mini air con

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?

Author:  gtogreen1969 [ Sun Oct 09, 2016 8:44 pm ]
Post subject:  Re: Mini air con

If there is a similar relay then swap it over to test it

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

Author:  Harley [ Sun Oct 09, 2016 9:17 pm ]
Post subject:  Re: Mini air con

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.

Author:  decsmith [ Sun Oct 09, 2016 9:40 pm ]
Post subject:  Re: Mini air con

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!

Author:  decsmith [ Sun Oct 09, 2016 9:41 pm ]
Post subject:  Re: Mini air con

Here's the diagram

Author:  decsmith [ Sun Oct 09, 2016 9:42 pm ]
Post subject:  Re: Mini air con

I've pulled the plugs to the thermostat, relay module and switch pack and it still blows

Author:  decsmith [ Sun Oct 09, 2016 9:54 pm ]
Post subject:  Re: Mini air con

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

Author:  Harley [ Sun Oct 09, 2016 10:07 pm ]
Post subject:  Re: Mini air con

Ckeck if one side of the fuse is earthed?

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