Power problem confused - MINI Cooper Forum

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post #1 of 7 (permalink) Old Dec 5th, 2012, 10:40 PM Thread Starter
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Thumbs down Power problem confused

Hi guys I've recently had a problem with my r50 it start as soon as the U.K got cold, I was parking up and suddenly the dash went crazy and power steering hardened up, I had a thought that the pump was about to fail, but when I went to the car today I unlock it and went to start it but it was completely dead, the battery still had 12v charge, and when I checked the alternator the other day it was charging at 14.4v , so there is nothing wrong there, but anyway as soon as I got back into the car I pressed the unlock button on the key fob and put my key in and everything came up as normal. Can the forum shed some light on my situation. Here's my video link for the steering problem.

youtube.com/watch?v=_VIkUe2AI5M&feature=plcp
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post #2 of 7 (permalink) Old Dec 6th, 2012, 04:33 AM
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Check connections

Check the power lead to the power steering pump. It is a push on fit, if loose it can cause temporary loss of power steering and may cause the the entire electrical system to temporarily shut down. Took me about a week to find this out!

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post #3 of 7 (permalink) Old Dec 6th, 2012, 07:34 PM
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Hi ya

Check you earth points, it looks like an earth problem to me
Check to one in the fuse box in the engine bay thats where the pump earths to and also engine to body earth also make shore the fuse box is dry is a poor design and does suffer from water ingress

Hope this helps
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post #4 of 7 (permalink) Old Dec 10th, 2012, 06:50 AM Thread Starter
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Hi guys what's even worse is that I don't think it is the power steering problem as originally thought, as I was about to go shopping with some friends, when I parked outside 1 of my mates houses and pressed the horn everything started going crazy on the dash again like from my YouTube video, it's so strange the battery is at 12volt even after being left for 2 days and the alternator is charging fine at about 14.1-14.4 volts I've checked for connections and can't find anything wrong at all?
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post #5 of 7 (permalink) Old Dec 10th, 2012, 01:38 PM
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Hi ya

From what you say I would look at the body control unit, its in the drivers foot well they suffer from water ingress which causes corrosion and the strangest of electrical nightmares.
I would suggest to take out the trim to gain access to it and check the plugs are not wet or corroded and while there off give them a blast with a switch and contact cleaner / lub, maplin or rs will sell this.

I will find a link for you on the BC. mab01 has a very good write up I will find for you

Link added below

http://www.mini2.com/forum/first-gen...-problems.html
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post #6 of 7 (permalink) Old Dec 10th, 2012, 06:35 PM Thread Starter
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hi guys, just an update the fusebox was completely dry, and just checked the bc1 and that is also dry, ive done a thorough check on all earth points within the engine bay and test fine, ive even shoved 500v down them buy doing a insulation resistance test all are fine.
I will have to take the power steering pump out i think and give it a clean up, because what ever it is it seems to happen only when there is a load of current getting used, i just started the car with headlights, mainbeams, heater and radio on and obviously with the car essentials on eg power steering pump aswell and the dash goes crazy, which would have directed to the alternator which is fine, which is now brought me to think the PSP is filled with carbon which is around the brushes and the control unit. does anyone else before i take on this dread task
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post #7 of 7 (permalink) Old Dec 13th, 2012, 04:31 PM Thread Starter
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hi guys just an on the situation, since i remove the battery, battery casing, fusebox in the engine compartment, Since putting everything back it hasnt had any of the problems i had had described it all works fine again, HOW STRANGE!!! I notice that the battery casing had some water at the bottom, Which i think was a bit of battery water and not rain water as this was only in 1 little area in the middle of the casing, I think this indicates a bad battery which was causing the problem and from moving it out of the car it has seemed to fix a cell or 2 i hope and also the cable from the battery live to the fusebox which was in a terrible state, i havent replaced it, i have relocated it to its correct position as it was trapped under the battery casing. The only thing the car does now is dim when turning the steering wheel which is normal due to the current draw from the psp. if anything else happens i will keep everyone posted about it. for now im going to keep an eye on her and change the battery next week as i dont want an internal short! could be very nasty!
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