Boot full of water, no dash lights,indicator click etc - MINI Cooper Forum

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post #1 of 8 (permalink) Old Jan 16th, 2014, 10:39 AM Thread Starter
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Boot full of water, no dash lights,indicator click etc

Hi As a result of the monsoon like weather we have been experiencing lately the boot/trunk on my 2004 cooper convertible has filled up with water. This has coincided with the interior dash lights going off, no reversing sensor beep, no rear demist indicator dash light etc etc. I've read the threads about the BCU and have checked it and it is bone dry with the plastic cover over (looks in good condition no corrosion). Is there any where else I should be looking or is the BCU knackered.
Darren
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post #2 of 8 (permalink) Old Jan 16th, 2014, 06:30 PM
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Does it still have the original 2004 BMW battery, if so it may be failing and should be checked for full output under load first.

Also check all the earths and wiring connectors in the boot which may have have suffered water ingress.....moisture anywhere in the various wiring connectors, inside light units, bad earths, etc can cause short circuit problems with the signals/commands sent around the BUS wiring network by the BCU and received by other components and slave modules around the car, like the speedo assy module.
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post #3 of 8 (permalink) Old Jan 17th, 2014, 08:39 AM Thread Starter
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I replaced the battery a couple of years ago, that seems fine, do the wires run down the nearside or offside of the car to the boot. Because I cant see any wires at the moment without removing the side panels.
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post #4 of 8 (permalink) Old Jan 17th, 2014, 06:29 PM
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If the plastic side panels inside the convertible boot are anything like on the Mini Hatch they can be unclipped with small plastic catches to allow access to the inner wings and rear of light units where all the rear cables/wires run. The handbook should explain for access to light bulb replacemets.
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post #5 of 8 (permalink) Old Jan 20th, 2014, 12:15 PM Thread Starter
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Ok everything is bone dry, does this mean the bcu is kaput?
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post #6 of 8 (permalink) Old Jan 20th, 2014, 05:27 PM
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Only a diagnostic test at a Dealer will confirm fault.....but if so your own BCU can be fixed far cheaper than a new BMW replacement by sending to BBA-Reman in Kent:-
BBA reman online catalogue
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post #7 of 8 (permalink) Old Jan 30th, 2014, 02:36 PM Thread Starter
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Ok so I read on a bmw forum about the exact same symptoms on a 330 BMW, the cause? The cd changer in the boot had got wet, the cure unplug it! Did it work for me hell yes. The thieves at BMW mini wanted a 100 to plug it into a computer, so if anyone needs an unwanted BCU let me know
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post #8 of 8 (permalink) Old Jan 30th, 2014, 06:08 PM
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It has happened before, see link below......I should have asked you if you had a CD changer in the boot first....!
http://www.mini2.com/forum/first-gen...-cry-help.html
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