2004 Cooper Ignition and Brake lights wont turn off - MINI Cooper Forum

First Generation Faults & Fixes MINI faults and fixes 2001 - 2006

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post #1 of 5 (permalink) Old Mar 6th, 2014, 07:55 AM Thread Starter
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United-Kingdom 2004 Cooper Ignition and Brake lights wont turn off

Hi folks,

I am completely new to both MINI ownership and this forum, so apologies if this is posted in the wrong place.

I realllyyy need someones help regarding my 2004 Cooper R50.

The other night I parked my car in the garage, returned to it half an hour later and the Brake lights and the ignition are stuck on.

All the dash lights are on (as if the ignition is on) and the brake lights are stuck on.

I have read about the brake 'diode' and BC1 problems causing some symptoms, however, I have taken the BC1 out and its bone dry, and I can't find the 'problematic' diode.

Also, I completely removed and unplugged the BC1, thinking that this was the issue, and the ignition stayed on! Even with the unit unplugged the ignition stays on and will still start. I'm desperate for help as I've owned this car only 2 weeks and now this.

Thanks for your assistance!
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post #2 of 5 (permalink) Old Mar 6th, 2014, 04:48 PM
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Is the battery good? voltage drop can cause all sorts of funny things to happen with an ageing battery?
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post #3 of 5 (permalink) Old Mar 6th, 2014, 06:59 PM
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As said above check battery first....if original BMW branded battery from 2004 it will be at or near end of life.

Also check CD changer lead in boot behind plastic side panel ....the lead is fitted even when no CD changer option fitted and if it shorts out or connector gets wet/damp strange electrical things happen due to the Mini's modern interconnected 'network bus' wiring system.
Some threads below on this if you search Mini2.

Cd Wires shorting:
http://www.mini2.com/forum/first-gen...ml#post3779682

Another Cd Wires shorting:
http://www.mini2.com/forum/first-gen...-cry-help.html

This one was the power steering pump shorting...
http://www.mini2.com/forum/first-gen...problem-2.html

http://www.mini2.com/forum/first-gen...s-problem.html
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post #4 of 5 (permalink) Old Mar 6th, 2014, 09:54 PM Thread Starter
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Fantastic forum! Unplugged power steering pump! Presto! No more warning lights! Pump must be shorting out internally! Thank you VERY much for your assistance!
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post #5 of 5 (permalink) Old Mar 6th, 2014, 10:21 PM
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That is good news to find cause quickly....
Power steering pump control circuit board is internal to the pump and often the cause of pump failures due to shorting as it gets coated with graphite dust over the years from the electric motor brushes.

If you want a reasonable priced reconditioned PS pump with warranty try BBA-Reman in Kent:
BMW MINI STEERING PUMP (ELECTRIC) | eBay

Power Steering Pump replacement "How to":
Power Steering Pump replacement - Mini Cooper Register Forum
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