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BMW X5: seat belt..air bag..horn..the interior light started dimming…

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My BMW X5 started having...
My BMW X5 started having problems yesterday.....first my seat belt and air bag warning lights came on and would not clear. Then i noticed that none of my steering wheel controls were working (ie volume, channel change, horn) and then finally my lights started playing up by coming on and off whilst driving, and the interior light started dimming and then getting very bright......Any ideas??
Submitted: 8 years ago.Category: UK Car
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Answered in 2 hours by:
6/25/2010
UK Auto Mechanic: Mike, UK Car Mechanic replied 8 years ago
Mike
Mike, UK Car Mechanic
Category: UK Car
Satisfied Customers: 39,198
Experience: Hi, I am a Car/ vehicle technician of 34 years. 29of -running my own repair/diagnostic business.
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Hello and Welcome to justanswer...

This is obviously an electrical problem that is affecting all the different systems - and it could be originating from a faulty / over charging alternator..

The first thing to do is to check the output of the alternator.. you should have approx 14.6 volts going into the battery - If you have more than that - 15 V or over, thats whats causing the problem and would need changing...

A faulty alternator like this can cause all manner of electrical issues ..so thats the first thing to check..

If its not that and that tests ok - then it is most likely a module ( computer component ) fault - and this then would need diagnostic equipment connecting to ascertain the fault ...generally you will need the help of a suitably equipped garage at this point....

So work through as above and one way or the other as above , it will be sorted..

I Sincerely XXXXX XXXXX have helped you - Please ask me if you need more help...


Kind Rgds, MIKE

 

  • >>>>>>>>>Please don't forget ....Please press the ACCEPT button if you are happy with my answer/advice given -as that's how I get paid for my time ... Thank you...

 

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Mike, UK Car Mechanic
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