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Oilline
Silverstone


Joined: 20 Jun 2009
Posts: 131
Location: Skipton, North Yorkshire


PostPosted: Tue Jul 02, 2019 8:19 am    Post subject: Reply with quote

So after my fan refurb the car went straight off to the paint shop for some tidying up.
I therefore did not realise my alternator was not charging my battery. The battery light is not coming on but checking the voltage at the battery with the engine running im only seeing 12v.
So i need to whip the alternator off and see if i also have got my wires crossed!
Or could it be a faulty voltage regulator which i fitted? Its marked up as a Beru part bit it was very cheap off the internet. You do hear of fake components being sold.
So to clarify, the blue wire goes to the insulated terminal and the brown wire to the alternator chassis?
But shouldnt my battery warning light be on ??
 
  
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Cameltoe & Heel
Barcelona


Joined: 26 Jan 2009
Posts: 1327
Location: Preston - Lancs


PostPosted: Tue Jul 02, 2019 10:08 am    Post subject: Reply with quote

Hi there, I had the same issue after my rebuild, the alternator not charging the battery. It's unlikely to be your new regulator, it's more likely to be the alternator itself.

I took mine to a local specialist and he diagnosed an issue with the rectifier, swapped it out for a new one, cost circa £100. Put it back in and all was well.

Mine did cause the battery light to illuminate however.

Trev
 
  
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andyobro
Silverstone


Joined: 02 Nov 2007
Posts: 147
Location: Poole


PostPosted: Tue Jul 02, 2019 10:13 am    Post subject: Reply with quote

Oilline wrote:
So after my fan refurb the car went straight off to the paint shop for some tidying up.
I therefore did not realise my alternator was not charging my battery. The battery light is not coming on but checking the voltage at the battery with the engine running im only seeing 12v.
So i need to whip the alternator off and see if i also have got my wires crossed!
Or could it be a faulty voltage regulator which i fitted? Its marked up as a Beru part bit it was very cheap off the internet. You do hear of fake components being sold.
So to clarify, the blue wire goes to the insulated terminal and the brown wire to the alternator chassis?
But shouldnt my battery warning light be on ??


You are correct on which wire should be where, the wires on mine naturally sat the other way round when I fitted it, hence my mistake. I think the battery light was on when I had my wires crossed, but not 100% sure now.

Edit, just reread my post when I made the mistake, I think I would have mentioned the battery light, so I don't think it cam on with the wires swapped, but not 100% sure, sorry i can't be definite on that point.
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993 Carrera
www.instagram.com/993andy
 
  
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Kat1
Monza


Joined: 04 Nov 2010
Posts: 167
Location: Ely, Cambs


PostPosted: Tue Jul 02, 2019 10:57 am    Post subject: Reply with quote

Do these pics help?



 
  
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Oilline
Silverstone


Joined: 20 Jun 2009
Posts: 131
Location: Skipton, North Yorkshire


PostPosted: Wed Jul 03, 2019 6:47 am    Post subject: Reply with quote

So was my own stupid fault. Found the 8mm nut securing the main power lead rattling around inside the plastic end cap ! I mustn’t of tightened it up when I put it back together after doing the fan.
Charging now but only 13v on tick over. I have a single pull conversion so alternator running slower than standard so maybe that’s why ?
 
  
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andyobro
Silverstone


Joined: 02 Nov 2007
Posts: 147
Location: Poole


PostPosted: Wed Jul 03, 2019 12:01 pm    Post subject: Reply with quote

Oilline wrote:
So was my own stupid fault. Found the 8mm nut securing the main power lead rattling around inside the plastic end cap ! I mustn’t of tightened it up when I put it back together after doing the fan.
Charging now but only 13v on tick over. I have a single pull conversion so alternator running slower than standard so maybe that’s why ?


Ya wally Smile I have single pulley conversion too, I haven't checked to see what it charges at at idle, I may get chance tonight.
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993 Carrera
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