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Discussion Starter · #1 ·
So, Christmas Eve I break down in the middle of Xmas rush hour. It flashed low battery before the steering and brakes stopped working, then wouldnt start again. So I went and got a new battery and car fires up again, not long after and it flashes low battery again.


So now rather than get stuck again I've done some tests. When the car is off, the battery reads 12.4v, when running it's 11.6v so I assume the alternator isn't doing its job. The Aux belt is less than 200 miles old(same as cam belt, water pump and dephaser pulley).


I just checked the connections and they seem ok. I checked the fuse on the red wire going to the battery and it seems ok.



So, any suggestions?


Thanks, Phil
 

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Yer Right
Alternator.
At least the shops are open tomorrow. >:)
 
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Discussion Starter · #3 ·
Yer Right
Alternator.
At least the shops are open tomorrow. <img src="http://www.renaultforums.co.uk/images/RenaultForums_uk_2016/smilies/tango_face_devil.png" border="0" alt="" title="Devil" class="inlineimg" />
I think I have found the issue. Attached pic.

It turns out you don't need to take the alternator off to change the brushes ***x1f642;

Will take photos of the process.
 

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51 plate Laguna 2 1.6
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Thanks for clueing everyone in.
Any more pics? They'll help somebody else, because I for one didn't know it was an alternator-in job.
 

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I've noticed it has fixed another issue I had. When stopped at lights occasionally it would rev from 800-1400 up and down, I presume this was the ECU trying to maintain charge. That has gone now!
 

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51 plate Laguna 2 1.6
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I've noticed it has fixed another issue I had. When stopped at lights occasionally it would rev from 800-1400 up and down, I presume this was the ECU trying to maintain charge. That has gone now!
TBH that sounds like something different, I don't think the alternator commands the revs.
But then, no point worrying about problems that have gone away.
 

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TBH that sounds like something different, I don't think the alternator commands the revs.
But then, no point worrying about problems that have gone away.
But it does apply load intermittantly, especially when brushes are failing.
Which to me explains the rev change.
 
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